Q: Can bad coils fry that computer the PCM

asked by on

Mechanic said that the PCM in the car was fried and that it was caused by bad coils that there was a short in the coils and also a bad injector they replace the computer and one of the coils I drove it 3 miles and they said that they computer fried again and had to replace it again

My car has 121000 miles.
My car has an automatic transmission.

OBD-II PCMs have circuit protection to take account of the possibility of shorted actuators (fuel injectors, coil drivers) and other electrical overloads. Statistically, the PCM is probably the most reliable component on the entire vehicle. If the cause of the original fault (no start?) was claimed to be due to "coils", then how could the PCM have possibly failed again if a new coil was installed and the other coils were verified? That is, if the PCM was truly damaged, the cause obviously has nothing to do with the coils inasmuch as the failure occurred twice (after the coil issued was repaired). If you are back to square one and need a conclusive diagnostic, please request an electrical diagnostic and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. Can bad coils fry that computer the PCM

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: The driver side power window will not roll back up

The most common cause of the window will not roll up is caused by the window regulator binding up causing the motor to bind. I would recommend having the motor and regulator checked and replace motor and regulator.

Q: B2278 code for 2008 Ford Escape

Hello - You are correct that the torque sensor, or rather a bad torque sensor signal, is the cause of this problem. There is, however, a Ford Recall (Recall 14V284000) for this problem, so you don't have to do anything...

Q: I have an engine code on a 2009 Lincoln Town Car that indicates a bad thermostat sensor or thermostat. Is this time critical to ge

If the engine does not get to operating temperature in a certain amount of time the computer will set a code after two complete drive cycles doing the same thing. This is an indication that the thermostat is stuck partly...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...