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ECM (Engine Control Module)

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Symptoms of a Bad or Failing Engine Control Module (ECM)
Common signs include the Check Engine Light coming on, engine stalling, misfire, or performance issues, and the car not starting.
How Long Does an Engine Control Module (ECM) Last?
As technology continues to advance and move forward, so does the way our vehicles operate and run. It seems more and more parts rely on computers and sensors than ever before....
What Is a Vehicle's Electrical Control Unit?
You’ll hear the term ECU bandied about in automotive circles, but what does it mean? The most basic definition is “electrical control unit” (ECU) which is a generic term applied to any...

Related questions

Question
no communication with computer and the security light is on.
Hi there. The security is active and the computer will not communicate with the vehicle as it is being turned off. Remove the battery cable for 13 minutes and during that time, operate everything in the vehicle, even though there...
Question
2008 Kia Sportage had extremely low or no oil or radiator fluid a day after ECM replacement and sensor lights did not come on.
ECM replacement does not implicate the engine lubrication or cooling systems. It is possible the fluid levels were already low when the vehicle was presented for service although admittedly it is also possible to envision a scenario where a shop...
Question
I have a 1996 infinity Q45 and the ECM (computer) isn't working. I've been looking on the internet to find a new one.
Hi there. When looking for an ECM (computer) for your vehicle, as long as the computer is the same design and has the same harness connections it will adapt to your vehicle. The only thing is, you will have to...
Question
2008 Chevy Malibu with 3.6 liter Noah buzzing noise coming from the ECM and no power going to the inside fuse box.
Hi there. Check the battery and see if there is power and a voltage of 12.6. If the battery is dead, then either charge the battery or replace the battery with a fully charged battery. If the battery is fully...
Question
I need help with determining which computer module is for a 08 Honda Accord V6 Sedan.
Hi there. The best thing to do is take pictures of the ECM (computer module) and relate them to the location that your are wanting to purchase another ECM. I recommend replacing your ECM with the OEM specific required part...
Question
Would a 2000 VW Passat 2.0 ECM fit in a 2002 VW Passat v6 3.0?
Hi there. The Engine Control Module (ECM) on a 2.0 engine will fit on the 3.0 engine, however, the ECM may have to be flashed (reprogrammed) to the vehicle you have. If the engine block was swapped out, then the...
Question
Car starts and then dies, think my ECM is bad.
Hi there. If the security is on and you are not able to shut it off, then there could be a faulty key transponder, security control module, faulty key fob, or the key cylinder has failed. The ECM (computer to...
Question
After installation of a new throttle body does everything reset to normal function on the car?
Hi there. After replacing the throttle body to your engine, if the engine light was on and has a pending code, the code will go away. If the code was a hard permanent code, then the ECM (computer) would need...
Question
I just had a air mass filter sensor put in my car 2011 on Nissan Altima plus a new air filter and the check engine soon light came on.
Hi there. Check the harness to the mass air flow sensor (MAF) and see if its connected correctly. Check all of the clamps around the sensor and make sure that they are all tight. The light is still coming on...
Question
ECM replacement
If you have a need to have the ECM replaced then you will need to have one programmed for your vehicle and have the system integrated so all the modules talk to each other. This will require the computer to...
Question
Hello...I have a 2004 infinity m45. Everytime I started my car it jerked so I took it to a mechanic and I was told my camshaft sensor harness was bad.
Hi there. Anytime the battery is not disconnected and a wiring harness is removed, there is spikes of power that is sent directly to the ECM (computer). Either there is a plug that is not plugged in on your engine...
Question
Reduced Power and P0601 code is found in computer.
Hi there. The P0449 evaporative code is on for either an electrical circuit malfunction to the vent solenoid or the vent solenoid on the emissions circuit has failed. The P0601 code comes on when the computer can no longer register...
Question
Vehicle won't start after I switched the ECM.
Hi there. First check the battery cables and make sure that they are clean and tight. Then check all of the sensors and make sure that all of them are connected. Then check the ECM and make sure that the...
Question
I have a 2.3 L and switching to a 3.0 L. How do I know what new ECM and wiring harness to buy?
Hi there. The best thing to do is go to the local parts store and have them get a harness for your vehicle with a 2.3L engine and a 3.0L engine. Then you can compare the different wiring harnesses to...
Question
I took the engine out of a 2007 malibu and put it into a 2005 cobolt and now it won't start.
Hi there. Check all of the sensors to the engine and make sure that all of them are connected. Check the computer and see if there is an wires disconnected to it. A loose wire or a sensor to the...
Question
I put a engine out of a 2007 malibu in the 2005 cobolt. Why will the engine not start
Hi there. Check all of the sensors to the engine and make sure that all of them are connected. Check the computer and see if there is an wires disconnected to it. A loose wire on any electrical system will...
Question
What is the price range to reset and/or reprogram the computer?
Billing question was sent to CS for the cost to reset or reprogram a ECM (computer) for a 2008 Volvo S80 with a L6-3.0L turbo engine.
Question
2011 Scion XB ECM replacement cost.
Hi there. The time to replace an ECM (Engine Control Module) on a 2011 Scion xB with a L4-2.4L engine is around 1 to 2 hours not including programming the ECM. ____________________________________________ Billing question was sent to CS for the...
Question
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...
Question
Idles but when driving it acts like its out of fuel.
Check all of the battery ground cables to the car on the battery, engine, and chassis. There is a bad ground somewhere that is causing the ECM to not work properly. This would cause the fuel pump to not work...

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