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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 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: AstroStart 2524 just beeps trying to start engine. Lock and unlock work fine.

Hi there. First check the starter wire, it is tan / light blue located at the ignition harness. Usually during installation of the remote start system this wire is cut leaving you with two ends. One wire is coming from...

Q: Does a new ECM for this year make model need to be flashed in order to drive the vehicle? 2004 Ford Focus

Yes, a new ECM will have to flashed before you can even start your vehicle. The "flashing" or programming of the ECM will require your VIN number to the supplier, who should be updating the most current software for your...

Q: tachometer.speedometer temp gauge not working

If cluster fuses are good, check/clean the battery ground, bot the terminal and where the ground cable connects to the chassis. If that doesn't help, then you have a bad instrument cluster and it will have to be replaced. ...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...