What happens if my PCM fails the emissions test?
This may cause you to fail your state’s emissions test. If your car does fail, check your PCM and ECM first. Believe it or not, a failed PCM or PCM may actually be good news: replacing either of these systems is significantly cheaper than getting a new catalytic converter.
Can a bad PCM cause a car to not start?
This can be caused by several different PCM errors, but may also be an indication of something wrong in your ECM. Regardless, this is a serious problem, since your car could potentially fail to start when you’re stranded on a country road, in an empty parking lot, or any number of undesirable locations. 3. Sudden Loss of Gas Mileage
What happens when my PCM has a problem?
When your PCM experiences a problem, it logs an error code, which will display on any connected code reader device. If this is your first sign of trouble, congratulations! You found the problem before it got any worse.
Why is my engine not responding to my ECM?
This can happen for any number of reasons, but usually, it’s a problem with your engine timing. While that function is directly controlled by the ECM, your PCM may also be at fault, since the ECM requires feedback from the PCM to adjust timing. 6.
Can a corroded ECM cause a car to fail?
If the wires to the transmission or fuel injectors become corroded, they can lose conductivity, leading to a failure. Fortunately, these issues can usually be resolved by replacing the corroded wires. If one of the wires shorts out to the frame, the ECM may fail entirely.
What are the symptoms of a bad ECM computer?
There are a few things that can tip you off that there’s a problem. Here are the four most common symptoms of a bad ECM computer: There are many reasons your Check Engine light can turn on. These range from emissions problems to faulty O2 sensors to problems with the ECM.
Can a dead battery affect an ECM system?
While most of your car’s systems can run on far less than 12 volts, dead battery cells can impact your ECM before they affect your starter or headlights. In this situation, replacing your battery will usually solve the problem. There are a few things that can tip you off that there’s a problem.
Can a bad ECM cause a stick shift?
The ECM doesn’t control the transmission on a stick shift, so if you’re having problems with your five-speed, it’s the transmission. If you’ve done numerous repairs on the transmission and replaced your automatic transmission fluid and you’re still having problems, the ECM could be at the root of your problems.