Skip the auto shop - Our mechanics make house calls

Q: Interlock is installed but the car won't start and the ECM is fried. Can the interlock damage the ECM?

asked by on

I don't know if I really need a new ECM,if the interlock really did effect the ECM or if the guys at big O Tire are not quite sure what's wrong and don't want to tell me.

My car has 7855 miles.
My car has an automatic transmission.

Hello. Though the shift interlocking system does have an input from the ECM, I have never seen one fail and cause this. Most of the time, this is caused by a bad brake pedal switch or a shift lock solenoid. I usually remove the center console and test the circuit to see what is going on with it. If there is power to the solenoid, then it is bad.

If not, then I go to the brake switch to test it. Typically, if it is not the circuit itself, it is a problem within the body control module. This can also easily be tested with a voltage meter and a scan tool that communicates with this module.

If you need to have this shift interlock issue looked at by someone else, consider one of YourMechanic’s certified technicians, who can come to your home or office to diagnose what is going on with the interlock system and repair it 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
  • Home
  • Questions
  • Interlock is installed but the car won't start and the ECM is fried. Can the interlock damage the ECM?

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: My car will not crank

Hello. A whining sound coming from the engine in a no start condition is usually a sign of a loss of compression. A compression test must be done to determin if that is your case.A loss of compression may be...

Q: Reduced Power and P0601 code is found in computer.

Hi there. The P0449 evaporative code is on for either an electrical circuit malfunction to the vent solenoid or the vent solenoid on the emissions circuit has failed. The P0601 code comes on when the computer can no longer register...

Q: How do I use an iPod with the infotainment system?

You can play an iPod through the infotainment system by connecting it via an AUX cable or a USB cable. Both the AUX and the USB cables connect to the ports in the center console. While an AUX cable will...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.