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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...
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...
P0484 OBD-II Trouble Code: Cooling Fan Circuit Over Current
Diagnostic Trouble Code (DTC): P0484 P0484 code definition When the PCM detects a voltage reading from the electric cooling fan control circuit that is either too high or too low in...

Related questions

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
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
can not find the transmission control module it is not on either side of front floor i have a 1997 audi a6 quattro
For the transmission control module for the 1997 A6 the control module is under right carpet inside the module box. You have to remove cover to access the transmission and engine control modules.
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...
Question
No power to the ignition.
When hooking up the battery cables backwards, the polarity of the voltage is reversed and will cause the fuses to pop, the alternator to burn out the regulator, and the computer (ECM) will burn up the ground circuit inside the...
Question
Replaced E38 computer on 2006 Pontiac g6. Should I try it out or does it need programming first?
The computer (ECM) will need programmed to the VIN of your vehicle before attempting to operate the vehicle. If you need further assistance with programming your computer, then seek out a professional, such as one from Your Mechanic, to help...
Question
When it rains hard right rear window goes down and sends car into limp mode. The trunk also leaks.
There are small bus computers in your vehicle that control multiple items throughout the car. There is a bus controller in each door on the car. It is possible that the door that is leaking water inside it is causing...
Question
I need the ecm/pcm replaced do you guys come out and do that?
YourMechanic can replace the ECM/PCM on your vehicle if a diagnostic has determined that it has failed. However, please note that PCM's rarely are the cause of a no start condition and thus all other potential causes should be investigated...
Question
I have a 2006 Honda Accord and the dash lights and radio willl sometimes go off then come right back on when I'm going about 40 mph.
The code P0685 refers to the main ECM (computer) relay has lost power. Check the main relay and see if its getting hot. A hot relay will disconnect to cool off and reconnect. If the relay is getting hot, then...
Question
Check engine light not working.
If the check engine light is not coming on, then that is a good sign. If your dashboard before displayed the check engine light before and now it is not coming on, then the dashboard warning light could have burned...

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