Why does my check engine light not come on?

Turn the key on all the check lights come on except the check engine light,theirs no spark no fuel pump. It has an old battery but it still turns the motor over good just checked batt. 13.06volts .

Do you need an engine warning light to pass Mot?

The answer to this is ‘no’ – the light itself isn’t but the issue that causes could prevent your car passing its MoT depending on what it is. Unlike many of a dashboard’s other warning lights, an engine warning light doesn’t alert you to a specific fault.

Is it possible to reset an engine warning light?

While the documentation for some older cars provided instructions on how to check and reset engine warning lights, it’s not usually possible now cars have grown more sophisticated. It’s well worth paying for accurate diagnosis, though, so a proper and effective repair can be made.

What does the OBD scanner say about no check engine light?

The OBD scanner says code U1001 or something like that which is no communication with ECM/ PCM. The only other things it says is MIL on and compression good. All else is N/A. helpful? Please confirm that it is a U1001. If it is, recheck all fuses in the under hood fuse box.

Is the Check Engine light on when I turn the key?

My check engine light does not light when I turn the key on. I have checked the bulb and it is okay. Other dash lights illuminate as they should when I turn the key on. yes starts and runs fine.

What happens if the Check Engine Light is not on?

If a problem occurs but does not meet the software’s threshold for the number of times the problem must occur before lighting the check engine light, the trouble code may be stored as a PENDING CODE. In that case, you could scan the computer and find a code, even though the light wasn’t on.

Where can I Find my Check Engine code?

Then later, if the problem does not reoccur, the computer will turn off the check engine light and store the code as a HISTORY CODE. Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. They include wiring diagrams and technical service bulletins.

What’s the best way to reset a check engine light?

In such a case, it is highly recommended to check the codes with a scanner instead. Switching the ignition on and off is also one method of hard reset without disconnecting batteries. Put the keys in your ignition and turn your ignition on and off consecutively after a second in each step.

The dome light did NOT come on when the door was open. I turned it on with the switch. The check engine light went off immediately after I turned the key to start. Yesterday it stayed on. When starting, the dome light flickered (I had turned it on manually today) , as it should.

Why is my Chevy Silverado 1500 not starting?

However, today, when the truck will crank and start, the antitheft icon goes off after a few seconds with the key on and stays off while the truck is running. It never flashed either today or yesterday though. And I don’t know if the antitheft system disables cranking or starting or both.

Why does my GM car say no start no crank?

How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.

How does the ignition switch work on a GM car?

The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of two relays. The second relay, the more important of the two, is controlled by the powertrain control module (PCM). And it only operates the starter relay after it’s satisfied that the correct key is in the ignition.

How old is the Check Engine light bulb?

I have seen quite a few times the inability to communicate with the ECM through a scanner, but no “check engine” with the key in the “ON” position, not so familiar to me. Sure the bulb is 14 years old but how many hours has it burned for, probably not many, pretty odd.

Where are the warning lights on a 2000?

Thanks guys. the warning lights on a 2000 are right on the circuit board for the cluster and don’t have seperate sockets with leads on them. One day when i am feeling adventurous again I will pull it out again and check for continuity with my tester and check the ecu as well.

Why is the Check Engine light not on?

When you have the key on, and the engine is not running, the check engine light is not on. Before you go to a lot of unnecessary work, let’s test the fuses first. Checking the wiring diagram, there are three fuses for this circuit.

When does the Check Engine light come on in a Toyota Avalon?

When you turn the key to the run position, the check engine light should come on. When you start the engine, the light should go out within a few seconds of startup. If your light does not come on, and you have emissions inspections in your state, your Avalon will not pass the inspection for your plates.

Why does my car not start when I turn the key?

If there is no sound when you turn the key, but the lights and accessories work, it could be the stater relay or starter solenoid. However if there is no sound at all, not even a click, it’s probably your battery.

Why does my car not start when the lights are on?

if the lights are on and remain on when trying to crank but the problem is that the starter does not even attempt to engage then this points to a problem with either the ignition switch or the exciter cable, this is the narrow gauge cable attached to the starter which, when made live, engages the solenoid to begin the cranking process.

Can a check engine light turn off by itself?

Can the check engine light turn off by itself? Yes, sometimes the light will turn off by itself as you drive it around for a while after addressing the issue that made it turn on in the first place. Why does my check engine light turn on and off intermittently? There could be a few reasons why this is happening.

Why does my car not start when I Turn on the ignition?

If nothing happens when you turn the ignition key to the “Start” position, it means that the starter motor doesn’t turn over the engine. Most commonly this could be caused by a dead battery; here is How to check the battery. If the battery checks out OK, but the starter still won’t crank, there could be a number of possible reasons.

What should I do if my car won’t start?

In most modern cars, only an authorized dealer can reprogram the key. Your dealer can also check the immobilizer system. When you turn the ignition ON before starting the car, the “Check engine” light is supposed to come on indicating that the engine computer (also could be called ECM, PCM, or ECU) is powered on.

How to know if your engine has no spark?

First Confirm Your Engine Has No Spark. 1 Disable the fuel system by removing the fuel pump fuse or relay. 2 Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. 3 Finally, Have someone crank the engine and watch for spark.

What causes a car to stall with no spark?

Consequently, An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. The engine may suddenly just shut off, almost as if the key had been turned off. Depending on the nature of the issue, sometimes the vehicle can be restarted and driven.

Turn the key on all the check lights come on except the check engine light,theirs no spark no fuel pump. It has an old battery but it still turns the motor over good just checked batt. 13.06volts .