How does Ford Expedition check engine soon work?

All Ford Expeditions use the same computer program and code set to record and diagnose engine malfunctions. This code set is known as OBD-II, or On-Board Diagnostics, Series 2. As the name suggests, the program continually monitors the engine through dozens of sensors to warn the driver if any of them exceed the factory parameters.

What is the diagnostic code for Ford check engine light?

Refer to our Generic OBD II code list for definitions on all other Ford diagnostic trouble codes. P1000 OBD System Readiness Test Not Complete P1001 KOER Test Cannot Be Completed

What causes a Ford Expedition engine to misfire?

Keeping in mind that any engine needs air, fuel, and spark for ignition, your Ford Expedition ‘s fuel system can often cause the engine to misfire. It can run too lean or rich. Alternatively, there may not be enough fuel for proper combustion, or the fuel isn’t atomizing properly.

What does a flashing check engine light mean?

A flashing check engine light is your Ford Expedition ‘s way of saying “I have a serious problem, don’t ignore me”. Most of the time, that serious problem is a misfire.

Refer to our Generic OBD II code list for definitions on all other Ford diagnostic trouble codes. P1000 OBD System Readiness Test Not Complete P1001 KOER Test Cannot Be Completed

Where is the fuse box on a Ford Expedition?

About us Contact us Ford Expedition (1997 – 2002) – fuse box diagram Posted on 28 July 2018by admin Ford Expedition (1997 – 2002) – fuse box diagram Year of production: 1997, 1998, 1999, 2000, 2001, 2002 Passenger compartment The fuse panel is located below and to the left of the steering wheel by the brake pedal.

What should I do if my check engine light goes off?

If anything goes wrong with the engine, the computer will illuminate the check engine light (CEL). If the light stays on, the fault is ongoing. If it goes off, the problem is intermittent, but the computer will store the code for later diagnostics. Open the hood of your vehicle. Locate the battery and identify the negative battery terminal.

What causes a Ford Expedition to run rough?

Crank/Cam Sensor- When the cam or crank sensors are not being read by the ECM/PCM, it’s impossible to get the ignition timing right. If you Expedition does start at all, it’ll run rough. It could be a more serious mechanical issue, such as as bent valve, bad lifter, etc….

What does EGR do on a Ford Expedition?

EGR- The EGR system recycles burnt exhaust gasses back into the combustion chamber. Crank/Cam Sensor- When the cam or crank sensors are not being read by the ECM/PCM, it’s impossible to get the ignition timing right.

What causes an oil leak on a Ford 5.4 Triton?

Oil Pan Gasket Leak The engine oil pan gasket can develop a leak on the Ford 5.4 Triton engine. It is not a major issue as it is usually corrected with gasket replacement. However, on certain Ford F-150 models, the oil may leak on the hot exhaust system which results in a strong smell of burning oil.

How to reset a Ford Expedition check engine soon light?

Open the hood of your vehicle. Locate the battery and identify the negative battery terminal. This is the one with the black wire attached to it. Slip a flat-head screwdriver under the plastic cover over the terminal and pry it loose. Slip a 1/2-inch socket over the horizontal nut on the battery terminal clamp and turn it counterclockwise.

Why does my Ford F-150 have a check engine light?

When the check engine light (CEL) appears on the dashboard of the Ford F-150, the truck is essentially communicating that there’s an issue somewhere. The first step should be to figure out why the check engine light came on in the first place as prolonging a diagnosis could cause more damage to the truck.

Can a phantom misfire be a check engine light?

Often called “phantom” misfires. It’s possible to find a misfire in your Ford, even if there is no check engine light. All you need is an OBDII scanner with Mode 6 function. It is a common situation. You’re driving your F150, F250, E150 van, or Expedition, etc and you can feel the engine skipping here and there.

Can a Service Engine Soon ( SES ) light be reset?

A “service engine soon” (SES) light is an easy way for your Ford’s onboard computer system to bring potential engine problems or failing parts to your attention. However, once you have had the repair completed, the light may not reset itself automatically. To turn the light off, you must perform a manual reset of your Ford’s computer system.

Why is the service engine soon light coming off?

If there are emission trouble codes that are not that dangerous for your engine, you can try to erase the code to see if the engine service soon light is coming off. If the light gets off when you are deleting the codes, it means that any of the stored codes are causing the service engine soon light.

What does service engine soon indicator light mean?

The Service Engine Soon indicator light illuminates when the ignition is first turned on (prior to engine start) in order to test the bulb, as well as indicate whether the vehicle is ready for Inspection/Maintenance (I/M) testing.

When does engine hesitation occur under light acceleration?

As the title suggests I’ve very recently been having some engine hesitation, and jerkiness, most noticeable around the 2-3000 RPM mark. It occurs when just cruising at a constant speed (most noticeable when around town), as well as light acceleration.

How many error codes are there on a car?

In a modern car, there can be hundreds of error codes, each one pointing to a specific issue. A mechanic—professional or skilled do-it-yourselfer—can access these codes to measure the overall health of the engine.

What’s the code for the Check Engine light?

This code set is known as OBD-II, or On-Board Diagnostics, Series 2. As the name suggests, the program continually monitors the engine through dozens of sensors to warn the driver if any of them exceed the factory parameters. If anything goes wrong with the engine, the computer will illuminate the check engine light (CEL).

What does your Ford check engine light mean?

In general, when your Ford check engine light comes on, it means that something has gone wrong with your engine . Specifically, it indicates that the On-Board Diagnostic System (OBD-II) has detected that something is wrong with your engine – that will matter later, so remember that.

Why is my car shaking and the Check Engine light flashing?

Check Engine Light Flashing and Car Shaking. Check engine light flashing car shaking is a clear sign of trouble. Vibration or shaking may be caused by misfires, poor fuel pressure, or faulty spark plugs. You should also know that a defective idle air control valve might make the engine idle drop significantly.

Why is your check engine light blinking?

or it may contain the words “check engine” or “service engine.”
a flashing light is more serious than a solid check-engine light.
Cause.
Loose Gas Cap.
Spark Plug Wires.

What kind of engine does a Ford Expedition have?

It was equipped with a standard V8 engine from October 1996 until 2014 when it was replaced with more compact, yet more efficient and powerful 3.5L EcoBoost V6 for model year 2015.

What kind of traction control does Ford Expedition have?

Traction control. AdvanceTrac electronic stability control was introduced for the 2003 model year as an optional extra on the second generation Ford Expedition (U222). Bundled with the electronic stability control system is four-wheel electronic traction control (functions at all wheels) for Expeditions with four-wheel drive.

When did the Ford Expedition go into production?

Styling approval was completed in early 1993 (3 1/2 years ahead of 1996 production) under design chief Bob Aikins, with the UN93 design being frozen by September 1993, at 34 months prior to July 1996 production commencement. The all-new full-size SUV was unveiled on May 9, 1996 and launched on October 2, 1996 as a 1997 model.

This code set is known as OBD-II, or On-Board Diagnostics, Series 2. As the name suggests, the program continually monitors the engine through dozens of sensors to warn the driver if any of them exceed the factory parameters. If anything goes wrong with the engine, the computer will illuminate the check engine light (CEL).

What causes the p0303 OBD-II trouble code?

What causes the P0303 code? 1 Faulty spark plugs. 2 Fuel injection issues. 3 Plug wires, cap and rotor, or coil pack issues (depending on what vehicle is equipped with). 4 Mechanical engine issue. 5 Intake air leaks.

How to diagnose misfire code P0300 cylinder # 8?

P0308 Cylinder #8 Misfire. Misfire is present, but no misfire codes are registered in the computer’s memory and/or no check engine light (CEL) on. Lack of power upon acceleration. Smell of unburned gas exiting the tail pipe. Rough idle and may stall. Cranks but does not start. Will not pass the emissions tests (smog check). Bad gas mileage.

Are there any problems with the Ford Expedition?

Ford Expedition owners have reported 37 problems related to engine shut off without warning (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Ford Expedition based on all problems reported for the Expedition.

When does the service engine soon light come on?

If your Check engine light is ON, the easiest way to diagnose this problem is to always check your trouble code memory with an OBD2 scanner. The check engine light will not light up if there is a scheduled service as the service engine soon light. It does only occur when there is a problem with your engine.

What to do if service engine soon does not go off?

If the light does not go off, try buying and installing a new gas cap. They cost less than $10 at your local car parts retailer. It is worth ruling out this common problem before proceeding to bring in the vehicle for an expensive service call. It Wasn’t the Gas Cap? Uh-oh!

If your Check engine light is ON, the easiest way to diagnose this problem is to always check your trouble code memory with an OBD2 scanner. The check engine light will not light up if there is a scheduled service as the service engine soon light. It does only occur when there is a problem with your engine.

What to do if your engine maintenance light goes out?

Check your engine control unit for any stored trouble codes. If you receive any codes, save them and try to get information about what they mean. If there are codes for emission problems that are not dangerous for your engine, you can try deleting the code to see if the engine maintenance light goes out.

How to reset the service engine soon light in a Suzuki?

Loosen the nut that holds the negative clamp in place. Remove the clamp from the negative post. Wait 20 to 30 seconds. Reattach the clamp to the negative post. Tighten the nut that holds the negative clamp in place. Turn on your Suzuki.

EGR- The EGR system recycles burnt exhaust gasses back into the combustion chamber. Crank/Cam Sensor- When the cam or crank sensors are not being read by the ECM/PCM, it’s impossible to get the ignition timing right.

Crank/Cam Sensor- When the cam or crank sensors are not being read by the ECM/PCM, it’s impossible to get the ignition timing right. If you Expedition does start at all, it’ll run rough. It could be a more serious mechanical issue, such as as bent valve, bad lifter, etc….

It was equipped with a standard V8 engine from October 1996 until 2014 when it was replaced with more compact, yet more efficient and powerful 3.5L EcoBoost V6 for model year 2015.

When was the second generation Ford Expedition made?

The redesigned second-generation Expedition was developed under the U222 program code name from 1996 to 2002, under Ford chief vehicle engineer Steve von Foerster and chief program engineer John Krafcik from 1998 to 2002.

Traction control. AdvanceTrac electronic stability control was introduced for the 2003 model year as an optional extra on the second generation Ford Expedition (U222). Bundled with the electronic stability control system is four-wheel electronic traction control (functions at all wheels) for Expeditions with four-wheel drive.

How to reset service Engine Soon ( SES ) light?

Press and Hold the Accelerator Place your foot on the accelerator and press it in, but this time, do not release, hold it there for ten seconds. During this step, the SES light will start to flash. 5. Release the Accelerator Release the accelerator pedal after the 10 seconds and see the engine light still blinking. 6. Turn OFF the Ignition

Is there a check engine light on a Ford F150?

It is a common situation. You’re driving your F150, F250, E150 van, or Expedition, etc and you can feel the engine skipping here and there. So of course you have your handy dandy OBDII scanner with you, so you plug it in to find out which cylinder is misfiring.

What to do when service engine soon light comes on?

In most cases, you have to repair the problem that caused the service engine light, and it will disappear by itself. If the light shows up because of scheduled service, you need to reset it with a diagnostic scanner or a particular combination for your car model. Can low oil cause service engine soon light?

How much does it cost to diagnose Ford P1401 code?

The cost to diagnose the P1401 FORD code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

What to do if check engine light code p0171 is triggered?

If check engine light code P0171 is triggered again, check the rest of the vacuum lines for leaks and continue to the rest of the diagnostic process. Remove the mass air flow sensor and clean the sensor using mass air flow cleaner or contact cleaner.

The cost to diagnose the P1401 FORD code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Press and Hold the Accelerator Place your foot on the accelerator and press it in, but this time, do not release, hold it there for ten seconds. During this step, the SES light will start to flash. 5. Release the Accelerator Release the accelerator pedal after the 10 seconds and see the engine light still blinking. 6. Turn OFF the Ignition

Why does my check engine light come on after filling the gas tank?

Typically if a check engine light comes on after filling the fuel tank, it’s due to a vapor pressure problem. This often is triggered by one of the EVAP system components. This system is designed to filter harmful vapors from the fuel tank.

What does the service engine soon light mean?

The Service Engine Soon (SES) Light indicates many other things that could range from a loose connection somewhere or a serious problem.

How to diagnose a Ford p0455 emission system leak?

The P0455 is a common code since it will set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes. The cost to diagnose the P0455 FORD code is 1.0 hour of labor.

It is a common situation. You’re driving your F150, F250, E150 van, or Expedition, etc and you can feel the engine skipping here and there. So of course you have your handy dandy OBDII scanner with you, so you plug it in to find out which cylinder is misfiring.

Check your engine control unit for any stored trouble codes. If you receive any codes, save them and try to get information about what they mean. If there are codes for emission problems that are not dangerous for your engine, you can try deleting the code to see if the engine maintenance light goes out.

What should I do if my check engine light is still coming on?

Put the keys in your ignition and turn your ignition on and off consecutively after a second in each step. Once it is done, see if the engine check light is still coming on or not. If the check light is off, you are ready to go, but if it is still coming on, get ready by reading the codes with a scanner instead. Let it Go Off Itself

A flashing check engine light is your Ford Expedition ‘s way of saying “I have a serious problem, don’t ignore me”. Most of the time, that serious problem is a misfire.

What does it mean when your check engine light is flashing?

Both a solid and flashing engine check light indicates that a problem has been detected. However, a flashing engine check light indicates that it is a serious problem that requires your immediate attention. If you see a flashing light, it’s best to contact a mechanic as soon as possible to prevent serious damage.

What does the PIP signal on a Ford Expedition mean?

The ignition control module generates a profile ignition pickup (PIP) signal (engine rpm) and sends it to the PCM. The PIP is one of the inputs that the PCM uses to determine transmission strategy, Wide-Open Throttle (WOT) shift control, torque converter clutch control, and EPC pressure.

Where is the IAT sensor on a Ford Expedition?

The IAT sensor is installed in the air cleaner outlet tube. The IAT sensor is also used in determining Electronic Pressure Control (EPC) pressures. The operation of the transmission is controlled by the powertrain control module. Many input sensors provide information to the powertrain control module.

What is the MAF sensor on a Ford Expedition used for?

The MAF sensor output signal is used by the powertrain control module to calculate injector pulse width. For transmission strategies, the MAF sensor is used to regulate Electronic Pressure Control (EPC), shift and torque converter clutch scheduling. The throttle position (TP) sensor is a potentiometer mounted on the throttle body.

The ignition control module generates a profile ignition pickup (PIP) signal (engine rpm) and sends it to the PCM. The PIP is one of the inputs that the PCM uses to determine transmission strategy, Wide-Open Throttle (WOT) shift control, torque converter clutch control, and EPC pressure.

How does the transmission work in a Ford Expedition?

The Powertrain Control Module (PCM) and its input/output network control the following transmission operations: Torque converter clutch operation. The transmission control is separate from the engine control strategy in the powertrain control module, although some of the input signals are shared.

The IAT sensor is installed in the air cleaner outlet tube. The IAT sensor is also used in determining Electronic Pressure Control (EPC) pressures. The operation of the transmission is controlled by the powertrain control module. Many input sensors provide information to the powertrain control module.

What is the crankcase pressure code on a Ford Expedition?

Just like MEDVIR post above, I recently used 5w20 oil in my 2015 expedition. This vehicle calls for 5W30. I was thinking living in a colder climate (MN), the thinner oil would be better in the winter. Within a day of the oil change, the engine service light came on and when scanned, the code was P051D (high crankcase pressure).

Why is your Ford check engine light on?

Why is Your Ford Check Engine Light On? – YouTube Why is Your Ford Check Engine Light On? If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

Just like MEDVIR post above, I recently used 5w20 oil in my 2015 expedition. This vehicle calls for 5W30. I was thinking living in a colder climate (MN), the thinner oil would be better in the winter. Within a day of the oil change, the engine service light came on and when scanned, the code was P051D (high crankcase pressure).

How to read FORD OBD diagnostic trouble codes?

No Heated Oxygen Sensor (HO2S) switching detected (front – HO2S) If using 12Vdc circuit test light, pay careful attention to length of pauses in order to read codes correctly. If using MIL/CHECK ENGINE light, service codes are displayed as flashes. Connections are displayed in image.

What is the code for Ford diagnostic trouble?

Refer to our Generic OBD II code list for definitions on all other Ford diagnostic trouble codes. P1000 OBD System Readiness Test Not Complete P1001 KOER Test Cannot Be Completed P1039 Vehicle Speed Signal Missing or Improper P1051 Brake Switch Signal Missing or Improper P1100 Mass Air Flow Sensor Intermittent

How does the ignition control module work on a Ford Expedition?

The ignition control module operates by sending crankshaft position information from the crankshaft position sensor to the ignition control module. The ignition control module generates a profile ignition pickup (PIP) signal (engine rpm) and sends it to the PCM.

How is the transmission of a Ford Expedition controlled?

Electronic transmissions are controlled by a computer, otherwise known as the powertrain control module (PCM). Troubleshooting the PCM is a complex job that requires some special test equipment that the average do-it-yourselfer does not have—nor is cost effective for them to purchase.

How to reset service engine soon light Paul?

What You Will Need 1. Turn the Ignition to the ON position 2. Press the Accelerator in Quick Succession 3. Release the Accelerator 4. Press and Hold the Accelerator 5. Release the Accelerator 6. Turn OFF the Ignition 7. Start the Car Method 2 1. Disconnect the car battery 2. Drain the Remaining Power 3. Wait for Fifteen Minutes 1.

What causes an evaporative emission control system leak?

EVAP control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly. P0455 FORD Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light) Possible a noticeable fuel odor caused by the release of fuel vapors P0455 FORD Meaning

The P0455 is a common code since it will set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes. The cost to diagnose the P0455 FORD code is 1.0 hour of labor.

EVAP control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly. P0455 FORD Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light) Possible a noticeable fuel odor caused by the release of fuel vapors P0455 FORD Meaning

Why does my Ford Expedition not speed up?

Ford Expedition Won’t Accelerate: RPMS Go Up If your Expedition won’t accelerate, but the RPM’s go up it’s usually not going to be an engine related issue. Somehow, the power that your engine is creating is not making it to the rear wheels. This is typically a transmission related issue.

When did I Buy my Ford Expedition transmission?

I bought mine in October 2004 from a leasing company ( company service records were complete) and within the first month the trans completely failed. It started out slowly, but soon I noticed that the trans fluid was filled with metallic particles, and was dark, and burnt.

Is the Check Suspension light on on my Ford Expedition?

Yes sir, the check suspension light is on, I check the switch and switch on and off couple of time with no luck. They told me all the fuses are okay, that the problem is that the pump is burnt out and the relay is bad. I guess I must come up with $1500 to replace the pump. Sorry to hear about that.

What are the possible causes of P1401 Ford?

P1401 FORD Possible Causes Faulty Differential Pressure Feedback Electronic (DPFE) sensor Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection Damaged Powertrain Control Module (PCM) What does this mean?

What is the dpfe sensor on Ford p1400?

The system employs an EGR Valve, an Electronic Vacuum Regulator (EVR), and a Delta Pressure Feedback EGR sensor (DPFE). The DPFE Sensor measures EGR flow across an orifice located inside the special EGR Tube.

How do you turn off service engine light on Ford?

To turn the light off, you must perform a manual reset of your Ford’s computer system. This will force the computer to clear all error codes and return to a clean state. Raise and support the hood. Locate the battery, which is positioned toward the front driver’s side of the engine bay.

If there are emission trouble codes that are not that dangerous for your engine, you can try to erase the code to see if the engine service soon light is coming off. If the light gets off when you are deleting the codes, it means that any of the stored codes are causing the service engine soon light.

How do you reset a service engine light on a Ford?

Depending on the specific Ford model, you may have to remove and set aside a plastic cover found over the battery. Find the negative battery terminal. This is the black one, and it will be marked with a minus sign. Using a socket, remove the single bolt holding the terminal in place. Remove the terminal from the battery stud.

When does the Check Engine light come on?

The check engine light is coming up when the engine control unit or the transmission control unit has detected a fault in the engine or transmission system. If your Check engine light is ON, the easiest way to diagnose this problem is to always check your trouble code memory with an OBD2 scanner.

Where can I find the Check Engine Light code?

These are listed in numerical order for easy searching. When retrieving Ford check engine light codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on. 3.

Why does my check engine light not light up?

If your Check engine light is ON, the easiest way to diagnose this problem is to always check your trouble code memory with an OBD2 scanner. The check engine light will not light up if there is a scheduled service as the service engine soon light.

Where to get service engine soon code on F150?

In order to pull these codes from your F150, you’re going to need a diagnostic scanner. You can pick one up pretty inexpensively. Or, you can head to the local auto parts store. Most of them will be happy to hook a code scanner up and tell you why the service engine soon light is on, and provide you with the code number.

Refer to our Generic OBD II code list for definitions on all other Ford diagnostic trouble codes. P1000 OBD System Readiness Test Not Complete P1001 KOER Test Cannot Be Completed P1039 Vehicle Speed Signal Missing or Improper P1051 Brake Switch Signal Missing or Improper P1100 Mass Air Flow Sensor Intermittent

Is there a way to check engine codes without an engine reader?

Try the first two methods first, if you are able to get the engine codes through them then that’s amazing! But if not, then you can try this method. The main component of this step is using a piece of wire. The piece of wire will do the trick and you will achieve the engine code without an engine reader.

What does the check engine soon light mean?

As the name suggests, the program continually monitors the engine through dozens of sensors to warn the driver if any of them exceed the factory parameters. If anything goes wrong with the engine, the computer will illuminate the check engine light (CEL). If the light stays on, the fault is ongoing.

What does the P2004 Ford engine light mean?

Engine Light ON (or Service Engine Soon Warning Light) P2004 FORD Meaning The Intake Manifold Runner Control (IMRC) is an electrically actuated system consisting of a motorized actuator with an attaching linkage for each housing on each bank. The linkage attaches to the housing butterfly plate levers.

What is the diagnostic code for Ford 4.6L?

This article will help you to diagnose diagnostic trouble code P0171 (System Too Lean Bank 1) and/or P0174 (System Too Lean Bank 2) on your Ford, Mercury or Lincoln 4.6L or 5.4L equipped car, pick up, van or SUV. Although you can apply this info to any Ford vehicle with a V6 or V8, this info concentrates on the Ford 4.6L and 5.4L V8 engines.

This article will help you to diagnose diagnostic trouble code P0171 (System Too Lean Bank 1) and/or P0174 (System Too Lean Bank 2) on your Ford, Mercury or Lincoln 4.6L or 5.4L equipped car, pick up, van or SUV. Although you can apply this info to any Ford vehicle with a V6 or V8, this info concentrates on the Ford 4.6L and 5.4L V8 engines.

What does p0174 mean on a Ford F150?

1999-2003 Fords Windstar Code P0174. The problem is with the rubber grommets in the intake manifold bolts they will crack and cause an intake leak. 2004 FORD F150 P0171, P0174, P0301, Misfire and Lean Condition User Submitted Video What does this mean? Cost of diagnosing the P0174 FORD code Labor: 1.0

What does p0174 mean on a Ford Windstar?

It’s a very common problem for the Ford Windstar. 1999-2003 Fords Windstar Code P0174. The problem is with the rubber grommets in the intake manifold bolts they will crack and cause an intake leak. 2004 FORD F150 P0171, P0174, P0301, Misfire and Lean Condition User Submitted Video What does this mean? Cost of diagnosing the P0174 FORD code

How does Ford Expedition check engine soon work?