Q: Pcm ecu car won't start

asked by on

Replaced pcm and the car started and worked just fine for about a week, came home and parked the car, the next day the car wouldn't start. Called a mechanic he said the coil ignition wasn't reading from the computer. I called the place I got the pcm from they said it was my ecu, replaced my ecu now my car still will not start. The batteries fine the started good. I don't have much money to get it towed somewhere.

My car has 155000 miles.
My car has an automatic transmission.

Assuming the ECM is still working enough to report problems, getting any problem codes out of the system with a code reader is your best clue at this point - whether the Check Engine Light is illuminated or not.

If the engine will turn over - does it have spark at the spark plugs? If so, does spritzing starter fluid while starting get the engine to start briefly? Simply narrowing your search with codes and fuel/spark information goes a long way to getting you back on the road.

If you need help with this, I would recommend having your no start condition diagnosed by YourMechanic to inspect this problem, get an accurate assessment of damage, and a cost estimate for repairs. YourMechanic.com can dispatch a mobile, professional mechanic to your location for this repair.

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. Pcm ecu car won't start

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: Thermostat gasket replacement

Yes, you will be able to book a professional technician with YourMechanic to replace your thermostat. However, I wouldn't replace a gasket and not the thermostat because they come together and not separately. Plus, thermostats go out so often that...

Q: Is there a smell which develops in a car when the catalytic converter starts to go bad?

Hi there. If there is a rotten egg or sulfur type of smell then most of the time this is caused by a failure in the catalytic converter. When these fail and become too hot they will smell like this....

Q: My car makes a loud screeching noise whenever I turn the ac on, it stops after a few seconds. Could this be a bad compressor?

Hi there: It is very possible that your AC compressor is the source of this type of noise. Much like other accessories driven by the engine’s belts, the AC compressor has several interior components and uses a sealed bearing to...

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...
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...
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.