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.

A: Assuming the ECM is still working enough to...

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Windshield wipers not working.

The windshield wiper arms on these vehicle are prone to strip out and stop moving. The fix is to remove the wiper arm and inspect the splines on the are and the wiper shaft. Replace all the defective pieces. Most...

Q: car wont start

Hello, thank you for writing in. The cold weather can cause a wide variety of problems for your vehicle. You can start by testing for spark and fuel pressure to make sure the engine is receiving what it needs in...

Q: Check Engine Light is on - 2005 Dodge Stratus

You can keep replacing parts but until you get the codes in the computer diagnosed properly the Check Engine Light will keep coming on. The O2 sensors may give indications that they're not working when they are only indicating the...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.