Skip the auto shop - Our mechanics make house calls

Q: Car won't start, check engine light is out but other lights are on, got new control and immobilizer but the problem remains.

asked by on

First it didn't start and there was a problem within the coding but the check engine was working, then the control was down and the check engine wouldn't pop when we first start the car and of course the car wouldn't start. We got a new control and immobilizer and coil, but the problem is still the same. We found out that the dynamo was burnt so we cut it off and checked the cables and it is clear. What can be the problem forbidding the control from running and the check engine from turning on?

A: Hi, thanks for writing in. It is possible t...

Hi, thanks for writing in. It is possible that your check engine light bulb could be out. I would recommend having a qualified professional remove your instrument cluster to determine if the bulb for the check engine light has failed. If the bulb has failed, I would recommend having it replaced and see if your results change. If the bulb is not faulty, it is possible that something was installed incorrectly during the most recent repair. I would recommend retracing your steps to determine if any steps were skipped over or done improperly. This will help to determine the cause of why the check engine light will not work. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect your electrical system for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car cranks normally but won't start

Unfortunately for an issue like this, some diagnostic testing will need to be performed to identify if the problem is in the ignition system, the fuel system, or one of several other possibilities. I recommend having a certified mechanic, such...

Q: When I accelerate quickly the Check Engine Light comes on.

This may be related to many different things, such as a failing throttle position sensor or a bad mass air flow sensor. The throttle position sensor relays the position of the throttle plate relative to your foot's position on the...

Q: I have no power to the fuel pump or the fuel cut off switch. All fuses are good, what could it be?

Hi there - now that you have checked the fuses (Good job!) check the MFI relay on the under-the-hood fuse & relay box. It controls power to the fuel pump and the engine control unit (ECU). If it is working,...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...