What does the code p0301 mean on an engine?

Commonly associated with codes: P0300; What Does P0301 Mean? P0301 indicates that cylinder number 1 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is what provides the energy to power the engine.

What causes a misfire in a Ford P0300?

Low fuel pressure can cause intermittent misfires on multiple cylinders. When the pressure is below the specification, the engine does not receive the proper amount of fuel and will start to lean misfire. The fuel pump or fuel pressure regulator could be the source of the low fuel pressure.

What is the error code for a misfiring engine?

In the case of Error code P0301, it is the first cylinder of the engine that is misfiring. Error code P0302 indicates a misfire in cylinder 2. P0303 means a misfire on cylinder 3, and so on. P0300 means random misfires in multiple engine cylinders.

What does it mean when cylinder 1 misfire detected?

Cylinder 1 misfire detected. What Does P0301 Mean? P0301 indicates that cylinder number 1 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is what provides the energy to power the engine.

What causes a p0301 cylinder to misfire?

Vacuum leak – If your Wrangler has a vacuum leak, it can be very difficult for it to get the right air/fuel mixture. This will cause the cylinders to misfire and it’ll throw the P0301 if the leak is around that specific cylinder on the intake manifold.

What is the misfire code on Honda CRV p0301?

P0301 is a cylinder specific misfire code, which means that cylinder 1 is misfiring and causing the code.

What does the error code p0302 mean on a car?

Error code P0302 indicates a misfire in cylinder 2. P0303 means a misfire on cylinder 3, and so on. P0300 means random misfires in multiple engine cylinders.

What causes a p0463 code on a fuel level sensor?

Potential causes of a P0463 code include: The signal circuit to the fuel sender is open or shorted to B+ (Battery voltage) The ground circuit is open, or ground path may have high resistance due to rust or missing ground strap on fuel tank Damage to the fuel tank could cause problem in fuel level circuit

What causes a car to have a code P0420?

The code P0420 can be caused by an engine problem that’s pouring too much fuel into the catalytic converter, excess fuel that the PCM can’t control, a vacuum leak that’s causing excess air to enter the catalytic converter, OR, a damaged catalytic converter What goes wrong with a cat converter? Cut-away of a typical catalytic converter

What does trouble code P0300 mean on Chevy Aveo?

The P0300 Chevy trouble code will trigger the Aveo’s service engine soon light. The vehicle itself may begin to run rough. It depends on how serious the misfire is. The vehicle may produce excess vibration, espescially at lower RPM

What do the codes mean on a Chevy Aveo?

It will often be accompanied by codes P0301-P0308. These particular codes also indicate that there is a misfire detected, but they specify the specific cylinder. If you have P0300 and one of these other codes, the cylinder indicated by the cylinder specific codes would be where to start looking for your problem.

What does it mean when your engine light says P0300?

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. P0300 CHEVROLET Tech Notes The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring.

What happens when a misfire occurs on a P0300 Chevrolet?

P0300 Chevrolet Description. When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

What are the symptoms of spark plug p0301?

Many times, P0301 occurs when there are worn-out spark plugs, spark plug wires, or a faulty ignition coil. What Are the Symptoms of Code P0301?

What does a misfire on cylinder 1 mean?

A misfire is just what it sounds like; a cylinder that is not firing as it should. The P0301 code is caused by a misfire on the number one cylinder.

What does the last digit of the code p030x mean?

The last digit of the code P030X stands for the misfiring cylinder number. The code P0302 means cylinder 2 misfires, P0303 is the cylinder 3 and so on. The code P0300 stands for random misfire. That means that multiple cylinders misfire at random.

Many times, P0301 occurs when there are worn-out spark plugs, spark plug wires, or a faulty ignition coil. What Are the Symptoms of Code P0301?

What’s the misfire code on a Chevy Cavalier?

Testing a misfire code (P0300, P0301, P0302, P0303, P0304) isn’t hard and I’ll explain some of the testing tips and techniques that are performed to get the bottom of the misfire code and misfire condition. The info in this article applies to the GM 2.2L 4 cylinder equipped Chevrolet Cavalier, or Pontiac Sunfire, or Chevrolet Sonoma, or GMC Sonoma.

What is the code for an engine misfire?

But this particular problem is with a computer trouble code P0300. This is a general engine misfire. For a particular cylinder, the code would be P0301, P0302, P0303 or P0304, as the last number refers to which cylinder is misfiring. On a scan tool we can actually watch the cylinder misfire.

What does the p0301 code on a Chevrolet mean?

P0301 CHEVROLET Tech Notes The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1. Engine Cylinder 1 is misfiring. When a misfire occurs, engine speed will fluctuate.

What does the p0301 code on a Saturn cylinder mean?

Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1.

How can I tell if my cylinder 1 is misfiring?

Engine Cylinder 1 is misfiring. When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position ( CKP) sensor signal to vary, the Engine Control Module ( ECM) can determine that a misfire is occurring. Need more information on how to fix the P0301 CHEVROLET code?

What does the p0201 mean on an injector?

The P0201 indicates an injector fault on cylinder #1. The P0301 indicates a misfire on cylinder #1. If the injector isn’t spraying, it will cause a misfire, so concentrate on the P0201 and when fixed, the P0301 will go away. Causes for the P0201? Most likely a broken wire to the injector, poor connection at the injector or a bad injector.

What causes a p0301 injector to go away?

The P0301 indicates a misfire on cylinder #1. If the injector isn’t spraying, it will cause a misfire, so concentrate on the P0201 and when fixed, the P0301 will go away. Causes for the P0201? Most likely a broken wire to the injector, poor connection at the injector or a bad injector.

How much does it cost to get a P0300 code?

If the problem persists more tests need to be done to diagnose the problem, see ‘Possible Causes’. The cost to diagnose the P0300 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.

When to fix a P0300 engine misfire?

When P0300 occurs, it should be fixed immediately as long term driving with engine misfires could cause consequential damage to your engine and catalytic converter (s). Many times, P0300 occurs when there are worn out spark plugs, spark plug wires, or a faulty ignition coil. P0300 Symptoms Check Engine Light is on

What does P0300 stand for in medical category?

Commonly associated with codes: P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 P0300 Explained – Random/Multiple Cylinder Misfire Detected (Simple Fix) What Does P0300 Mean? P0300 indicates that two or more cylinders are experiencing misfires.

What are the causes of a P0300 leak?

P0300 Causes 1 Faulty or worn spark plugs * 2 Faulty spark plug wires or coils * 3 Distributor failure * 4 Faulty fuel injector 5 Vacuum leak 6 Low fuel pressure 7 Camshaft sensor defective 8 Crankshaft sensor defective 9 Engine timing off 10 Leaking head gasket

What does the code P0300 mean on a Toyota?

Random/Multiple cylinder misfire detected. What Does Toyota P0300 Mean? Toyota code P0300 indicates that one or more cylinders are experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder.

What does p0301 mean on a spark plug?

If your vehicle is equipped with individual coil packs instead of spark plug wires, start by removing the cylinder 1 coil and swapping it with the cylinder number 4 coil. If the misfire moved to cylinder number 4 (P0304), then you have determined that the coil pack is faulty and needs replacement.

When to fix a car with code p0301?

When P0301 occurs, it should be fixed immediately as long term driving with engine misfires could cause consequential damage to your engine. Many times, P0301 occurs when there are worn-out spark plugs, spark plug wires, or a faulty ignition coil. What Are the Symptoms of Code P0301? What Is the Cause of Code P0301? How Serious is Code P0301?

What does the P0300 OBD2 trouble code mean?

The P0300 trouble code means that the engine control unit recognized repetitive misfires on any cylinder in your car. You will often find this trouble code together with another trouble code of the specific cylinder this misfire happened on.

What does P0300 mean on Bank One?

Keep getting misfire codes p0300,p0301,p0303,p0305.Misfires all on bank one. P0300=means multiple misfires detected. P0305=means cylinder 5 had a misfire. Truck will lose power, burn gas, may idle bad at times. Codes will sometimes pop up when under light load.

What causes a Dodge Ram p0301 to misfire?

Vacuum leak – If your Ram has a vacuum leak, it can be very difficult for it to get the right air/fuel mixture. This will cause the cylinders to misfire and it’ll throw the P0301 if the leak is around that specific cylinder on the intake manifold. It’s easy (and kind of fun) to chase one down.

What does the code p0302 mean on a Dodge Avenger?

This makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring. It will often be accompanied by codes P0302-P0308. These particular codes indicate that there is a misfire in one of the other respective cylinders.

What is meaning of code p0301?

What Is the Code P0301? This code is a general onboard diagnostic (OBD) code for vehicles. It indicates that the cylinder no. 1 in the engine is experiencing a misfire. This means that the cylinder isn’t getting enough spark, which results in the misfiring condition.

What does the carmd code p0301 mean?

A P0301 code means that the the car’s computer has detected that one of the engine’s cylinders is not firing properly. In this case it’s cylinder #1. the engine may stumble / stumble, and/or hesitate

What does the code p0202 and p0302 mean?

It is P0202 and P0302 P0202 – Fuel Injector Circuit Malfunction Cylinder 2 Most likely cause a failed fuel injector or shorted wiring harness. P0302 is a misfire in cyinder #2 from the injector problem.

What do codes p0308 and p0316 mean?

This P0316 code means the powertrain control module (PCM) has detected a misfire shortly after startup, specifically within the first 1,000 revolutions. This code may also be triggered with another of the other misfire codes which are P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310, P0311, P0312.

What does a p0303 fire code tell you?

A P0303 code, for example, would tell you that the No. 3 cylinder is misfiring. To figure out which cylinder is No. 3, refer to a diagram of the engine’s firing order or look for markings on the intake manifold, spark plug wires or ignition coils (if the engine has a coil-on-plug ignition system).

What does the fourth digit on a P0300 code mean?

As a point of clarification, the fourth zero on a P0300 code indicates a “random” misfire distributed among a majority of cylinders, whereas the fourth digit (ex. P0301) indicates which cylinder is misfiring.

What’s the difference between p0301 and p0312?

For example, code P0301 indicates a misfire on cylinder one and code P0312 indicates a misfire on cylinder 12 (if your car has a 12-cylinder engine). Code P0300 is a bit different because it implies a “random misfire” rather than a misfire on a particular cylinder.

What causes a p0351 code on a cop?

Potential causes of a P0351 code include: Short to voltage or ground on COP driver circuit Loose connection at coil or broken connector locks Is the engine misfiring presently? If not, the problem is likely intermittent. Try wiggle testing the wiring at the #1 coil and along the wiring harness to the PCM.

What to do if your engine code is not p0301?

Use FIXD to scan your vehicle to verify P0301 is the only code present. If other codes are present, they must be addressed first. Check for loose connectors at the ignition coils or for damaged wiring (specifically cylinder 1). Look for loose engine ground wires as well. These can cause random misfire conditions. Tighten or connect where necessary.

Why is there a p0302 code on my cylinder 2?

It’s worth noting that, if other misfire codes accompany a P0302, there will likely be more than one potential cause. Code P0302 by itself is a good indicator that the problem is with cylinder 2 only. On the other hand, multiple misfire codes can indicate an issue, such as a vacuum leak or low fuel pressure, that affects various cylinders.

What does it mean when cylinder 1 misfire?

The P0301 code means that cylinder 1 has a misfire and isn’t burning fuel properly. Bearing in mind that you need air, fuel and spark for combustion, the cause of a P0301 code could come from a few different sources. In any event, a P0301 code is serious and shouldn’t be put off.

What does it mean when cylinder 1 has a trouble code?

Some systems may take several failure cycles before registering a trouble code again. The P0301 code means that cylinder 1 has a misfire and isn’t burning fuel properly. Bearing in mind that you need air, fuel and spark for combustion, the cause of a P0301 code could come from a few different sources.

What does trouble code p0304 stand for?

If your vehicle is equipped with coil packs, pull the coil pack for cylinder 1 and exchange it with the coil pack for cylinder 4. If you now see a P0304 trouble code, then the problem is with the coil pack. If the coil pack checks out, pull the spark plug for cylinder 1 and examine it for fouling, damage or excessive wear at the electrode and tip.

What does the p0303 code on Honda cylinder 3 mean?

P0303 HONDA Tech Notes The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 3. If the problem persists more tests needs to be done to diagnose problem, see “Possible Causes” What does this mean?

Why does my car have a p0306 problem?

A misfire from one or more cylinders can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure. When P0306 occurs, it should be fixed immediately as long term driving with engine misfires could cause consequential damage to your engine.

What does p0301 Honda cylinder number 1 misfire mean?

P0301 HONDA Tech Notes The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persists more tests needs to be done to diagnose problem, see “Possible Causes” What does this mean?

What does the p0301 code on an Audi mean?

The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persists more tests needs to be done to diagnose problem, see “Possible Causes” What does this mean?

How much does it cost to fix a p0301 Honda code?

The cost of diagnosing the P0301 HONDA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour. When is the P0301 HONDA code detected? Engine Cylinder 1 is misfiring. When a misfire occurs, engine speed will fluctuate.

What to do if Ford cylinder 1 misfire?

Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persists more tests needs to be done to diagnose the problem, see “Possible Causes”

What does the p0301 code on a Ford car mean?

Check for damaged components and look for broken, bent, pushed out, or corroded terminals. P0301 FORD Tech Notes The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1.

What are the symptoms of a Ford cylinder 1 misfire?

Engine Cylinder 1 is misfiring. P0301 FORD Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light) Lack/loss of power Hard start Engine hesitation P0301 Ford Description When a misfire occurs, engine speed will fluctuate.

What causes spark plug to go bad on Ford p0301?

P0301 FORD Possible Causes Faulty spark plug 1 Clogged or faulty fuel injector 1 Faulty ignition coil 1 Fuel injector 1 harness is open or shorted Fuel injector 1 circuit poor electrical connection Ignition coil 1 harness is open or shorted Ignition coil 1 circuit poor electrical connection Insufficient cylinder 1 compression

What happens when cylinder 1 of a Prius misfires?

What are the symptoms of a p0301 misfire?

Check engine light is not flashing. Symptoms: Noticeable miss at idle, hardly noticeable above 2000 RPM, slight loss of power while driving. Occasional stumble and or stall when taking off. Things I’ve done to resolve the… Need more help with a p0301 code?

Which is the trouble code for ho2s heater resistance?

P0053 OBD-II Trouble Code: HO2S Heater Resistance (Bank 1 Sensor 1) Cost of diagnosing the P0053 code. P0053 is a diagnostic trouble code (DTC) for “HO2S Heater Resistance (Bank 1 Sensor 1)”.

What are the symptoms of powertrain code p0135?

Code P0135 occurs when the powertrain control module tests the upstream heated oxygen sensor’s heater circuit on Bank 1 and detects a short in the circuit or excessive resistance in the heater circuit. What Are The Symptoms Of Code P0135? Check Engine Light is on; Decreased fuel economy; Rough running engine; What Is The Cause Of Code P0135?

What is the trouble code for ho2s heater resistance?

P0054 is a diagnostic trouble code (DTC) for “HO2S Heater Resistance (Bank 1, Sensor 2)”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $0.00.

What does p0053 mean on a ho2s heater?

Cost of diagnosing the P0053 code. P0053 is a diagnostic trouble code (DTC) for “HO2S Heater Resistance (Bank 1 Sensor 1)”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

What does the OBD2 code p0351 mean?

P0351 is a general OBD2 diagnostic trouble code (DTC) that points to a fault with the ignition coil A. What the P0351 code means The P0351 DTC is seen when the ignition coil A primary or secondary circuit has a malfunction.

When does the p0351 DTC signal come on?

The P0351 DTC is seen when the ignition coil A primary or secondary circuit has a malfunction. The engine control module is looking for specific signals from the ignition coil A and when these signals are not seen the ECU sets the Check Engine Light. The Check Engine Light will be illuminated on the dashboard.

What does diagnostic trouble code p0304 mean?

The diagnostic trouble code P0304 signifies that a misfire in the engine was detected by the vehicle’s computer system. To be more specific, this misfire happens in the fourth cylinder. Are you trying to get rid of code P0304?

When do you need to fix a p0304 misfire?

When P0304 occurs, it should be fixed immediately as long term driving with engine misfires could cause consequential damage to your engine. Many times, P0304 occurs when there are worn out spark plugs, spark plug wires, or a faulty ignition coil.

Why does my check engine light flash p0304?

Along with shown code and the Check Engine light that flashes, these are some other symptoms that you may notice. What Are the Possible Causes of the P0304? There are many possible causes behind the P0304 code. The most common causes include defective or worn-out spark plugs, defective spark plug wires, and faulty distributor caps.

What does lean fault code p0171 mean on a car?

Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust.

What are the causes of a faulty spark plug?

P0301 Possible Causes Faulty spark plug 1 Clogged or faulty fuel injector 1 Faulty ignition coil 1 Fuel injector 1 harness is open or shorted Fuel injector 1 circuit poor electrical connection Ignition coil 1 harness is open or shorted Ignition coil 1 circuit poor electrical connection Insufficient cylinder 1 compression

What does the p0301 code on a spark plug mean?

The P0301 code means that cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1.

When do I need to fix my engine p0301?

What does the p0301 code on Toyota Prius mean?

The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1.

What does p0306 mean on a fuel pump?

A code P0306 may mean that one or more of the following has happened: Bad spark plug (s), spark plug wires, or spark plug boots Malfunctioning fuel delivery system (fuel pump, fuel pump relay, fuel injectors, or fuel filter)

Why is code p0306 stored in OBD II?

The reason for a code P0306 being stored in your OBD II vehicle is that the powertrain control module (PCM) has detected an individual cylinder misfire. A P0306 specifically applies to the number six cylinder. Consult a reliable vehicle information source for the location of the number six cylinder for the vehicle in question.

What does p0301 stand for in Ford F150?

It stands for: P0301 should be considered a cause for concern, and can be a threat to the drivability the Ford F150. The one nice thing about P0301 is that it is a cylinder specific misfire code. This makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring.

Is there a misfire code on the Ford F150?

P0301 should be considered a cause for concern, and can be a threat to the drivability the Ford F150. The one nice thing about P0301 is that it is a cylinder specific misfire code. This makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring.

What does the p0306 Ford engine code mean?

If the engine speed fluctuates enough to cause the Crankshaft Position ( CKP) sensor signal to vary, the Engine Control Module ( ECM) can determine that a misfire is occurring. Need more information on how to fix the P0306 FORD code?

What does the misfire code p0301 mean?

P0301 is a cylinder specific misfire code, which means that cylinder 1 is misfiring and causing the code. An important thing to understand when finding the location of cylinder one is that it’s going to be the first cylinder in the firing order of the vehicle, and not the first cylinder that you might see when looking at the engine.

Where are the P0300 misfire codes stored?

The check engine light will be on. One or more misfire codes (P0300, P0301, P0302, P0303, P0304) will be stored in the car or pick up’s computer’s memory. P0300 Random Cylinder Misfire.

How much does it cost to diagnose Ford code p0301?

The cost to diagnose the P0301 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. How much do you know about cars? When is the code detected? Engine Cylinder 1 is misfiring.

What is the diagnostic code for cylinder 1 misfire?

P0301 is a diagnostic trouble code (DTC) for “Cylinder 1 Misfire Detected”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic.

How much does it cost to diagnose a p0301 code?

The cost of diagnosing the P0301 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

What does the p0301 code on autocodes mean?

The P0301 code means that cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persists more tests need to be done to diagnose the problem, see “Possible Causes”.

What is the p code for bank 1?

P0010 Camshaft position (CMP) actuator, intake/left/front, bank 1 circuit malfunction Wiring, CMP actuator, ECM P0011 Camshaft position (CMP), intake/left/front, bank 1 timing over advanced/system performance Valve timing, engine mechanical fault, CMP actuator P0012

What does the p0103 diagnostic trouble code mean?

This P0103 diagnostic trouble code (DTC) means that there is a high condition detected in the Mass Air Flow (MAF) sensor or circuit.

What are the causes of OBDII code p0171?

Common Causes of P0171 and P0174 1 Vacuum Leaks. 2 Mass Airflow Sensor (MAF). 3 Engine Computer Software Needs to Be Updated. 4 Fuel System Obstructions. 5 Intake Manifold Gasket Leaking.

What does a p0053 sensor 1 sensor 1 mean?

When I discover a stored P0053 code, I know that the powertrain control module (PCM) has detected a malfunction in the heater circuit of the upstream (or pre catalytic converter) oxygen (O2) sensor. Bank 1 indicates the malfunction concerns the bank of the engine that contains the number one cylinder.

What causes a p0103 MAF circuit to be high?

Potential causes for this trouble code may include: MAF sensor electrical harness or wiring problem (open, shorted, frayed, poor connection, etc.) Note that other codes may be present if you have a P0103.

What does the code p0301 mean on an engine?