Skip the auto shop - Our mechanics make house calls

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?

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
  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: P0507 idle code

The code P0507 is for a problem with the idle control valve. If all other checks are good with vacuum leaks and inlet air tubes then you may need to replace the idle control valve.

Q: engine check light on p o 132 oxygen senser change 3 times & check engine light comes on again what is the problem ?

Hi there. If code keeps coming back then you either have an issue with the circuit, you are using the wrong oxygen sensor, or you have something else going on with the vehicle. I usually install a scan tool to...

Q: How much should it cost to change freeze plug

Sent to CS

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...
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.