Showing articles & questions for topic
ECM (Engine Control Module)

Related articles

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
The engine on my car has seized and is a write off. Should the manufacturer accept any liability?
Unfortunately, your car is outside the warranty period, so legally speaking, they do not have to warranty your motor. It is unfortunate your car has suffered so many failures and very frustrating for you because you have done what you...
Question
Does my ECM / PCM have to be reprogram after replacing with new one?
Hi there. If you were to get an ECM (engine control module) from the dealership, the dealership will flash (program) the ECM to the VIN number to your vehicle and all of the specs. However, if you were to purchase...
Question
Can you raise the top speed control?
Hi there. There are two ways to speed up the vehicle. The first is to replace the output shaft speed sensor in the transmission to sense a slower speed, thus confusing the computer to make the car drive faster. The...
Question
The computer is not recognizing the sensors
The computer monitors are all needed to be passed in order to pass emission testing. These computer monitors will show if the engine emission systems are all functioning properly and the engine control module (ECM) stores the test results as...
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 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
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
Does a new ECM for this year make model need to be flashed in order to drive the vehicle? 2004 Ford Focus
Yes, a new ECM will have to flashed before you can even start your vehicle. The "flashing" or programming of the ECM will require your VIN number to the supplier, who should be updating the most current software for your...
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
I have to actually use a heater on th ECU PROM to get my vehicle to start when its cold.
You have successfully diagnosed your truck. It definitely needs a new ECM. Electronics are very sensitive to temperature. There are relays inside the ECM box that you are heating, which makes the contacts expand and create an electrical connection. This...
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
Does 4k seem reasonable to replace the wiring harness on a 2011 Jaguar XJ?
I think you should get a second opinion on this. The wiring harness should be trouble free unless something has happened to damage it. Accidents, fires, water damage, salt corrosion, or electrical overloads can damage a wiring harness, but you...
Question
Electric power steering code C2219 is coming up on a scanner.
Hi there. The code C2219 is coming up for the computer not able to communicate with the electronic power steering unit. Check all of the wiring from the power steering unit to the computer and make sure that the wires...
Question
Trouble code P0607 Engine Control Module & P0138 Oxygen Sensor Circuit
Replacing an engine control module should never be a first step. There are a number of other problems that can give a PO607 trouble code. First the battery voltage should be checked, and if the engine is running, the charging...
Question
Is it dangerous to drive while reduce engine power light is on?
The engine control module (ECM) has a safety feature built into it when the ECM detects a major fault in the sensors or actuators that can cause the throttle opening to be limited. With the reduced engine power and throttle...
Question
What's the difference between the ECM and PCM?
The engine control module (ECM) controls all the engine functions to keep it running correctly monitoring all the sensors of the engine. The power train control module (PCM) will include multiple control modules in one case called a PCM. The...
Question
Computer went bad that controls spark plug
Before you can determine if the vehicle should be repaired you should have a qualified mechanic like one from YourMechanic come to you and scan the computer for you. You may have a sensor like the crankshaft sensor that could...
Question
Check engine light staying on
The definition of the fault code you are seeing signals back to a problem with the system fuel pressure. The fuel pressure may be too high or too low. The pressure readings from the sensor to the ecm may be...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question