Skip the auto shop - Our mechanics make house calls

Q: What does ECP and ECM mean and is it bad?

asked by on

I had been driving my car and it was working perfectly. I had went to the store and when i got back to the car and tried turning it on it just would't work. The battery was fine and so was everything else but the letters ECP had showed up. I took it to the mechanic and they told me the car had ECM but i am not sure what that is and I'm not sure what to do. I was just wondering how serious it was and what do you recommend doing about it?

My car has 89000 miles.
My car has an automatic transmission.

Hello. I suspect you mean EPC (not ECP), which stands for electronic pedal control or electronic "gas pedal linkage". There is no longer a physical cable, wire or lever between the gas pedal, and the throttle body on the engine which regulates desired power.

The "gas pedal" has an electronic actuator and wiring that connects it to the electronic throttle position actuator on the throttle. These components are "paired", coded to each other in software, and have some level of awareness of each others precise characteristics.

If you replace one or the other, they must be "paired" to each other. Most likely the throttle position sensor is failing, and the software is detecting this. There should be problem codes indicating which component is failing (Check Engine light). ECM simply means "engine computer module", the electronics that manage your fuel injection, ignition timing, and if you have an automatic transmission that regulates how the transmission should shift based on gas pedal activity. Virtually all cars and trucks built today have at least one ECM. I would recommend having a Check Engine Light inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of damage, and estimate for repairs.

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!
  1. Home
  2. Questions
  3. What does ECP and ECM mean and is it bad?

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: How do I replace the remote keyless entry transmitter battery?

The remote keyless entry transmitter battery usually lasts for a few years. If the battery dies, you can easily replace it by following these steps: 1. Use a narrow tool to pry open the center cover of the transmitter. 2....

Q: My boy accidentally hooked battery cables up wrong on his truck, and now it's got white smoke that smell like gas coming out.

When hooking up the battery cables backwards, the ground became the hot and the hot became the ground. Most likely the computer (ECM) could have failed and the fuel pump may have burned up. I recommend checking all of the...

Q: Trouble starting car when cold

The starting issues scream timing. The typical causes that set these codes are the cam and crank position sensors. The only option you have not tried to my knowledge is the camshaft position sensor. I would start there. With all...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...