what can cause a pcm to go bad

I got a pcm ordered it worked for 30 min then went bad. A bad PCM, or power train control module, has a check engine light that does not turn off, an assortment of random codes, intermediate stalling issues and poor engine performance. However, if the shudder is caused by a bad solenoid or even a bad sensor, the problem can be solved by replacing the bad component. If your issue is just a no-start, then it's very likely that your PCM is fine. This may cause the transmission to shift roughly or more quickly than normal. Replacing the torque converter can be an expensive endeavor, because the transmission must be removed from the vehicle to get to the torque converter. You need to diagnose your problem by checking all possibilities first, than if it points to the PCM you can swap it with a junk yard PCM and if the problem goes away than you can use that one or get a new one. Burning Smell. These sensors fail at a much higher rate than any of the computers do. Given the fact you have power at the DLC you can rule out the battery, the cables, and the mega fuse to the junction block. Moreover, sometimes you will lose power altogether if the drive belt snaps in half. A faulty electrical system in a car can play some very tricky games, and your car’s battery is part of that system. My car has 121000 miles. It may even go into a "limp-in" mode and remain frozen in second or third gear. 1. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. And they said it couldn’t just be refurbished but had to be a brand new one that is reprogrammed too. If the transmission computer receives bad information from the transmissions own internal sensors or bad inputs from the PCM or other engine sensors, it will have an adverse effect on how the transmission operates. It’s not good to drive around with limp mode. If you have a bad car battery, it can make your car’s engine computer (ECU) act a little bit nutty. That's it - Answered by a verified Dodge Mechanic September 29, 2016 . came back few weeks later and was taken to another mechanic who said it had a pcm and everything else seemed to "work fine". The PCM is one of potentially several on-board computers, or essentially the "brain" of the engine control system. Don't know how much you wanna say to the dealer cause some don't take well to mods. Basically, two main reasons are account for a bad PCM and knowing them may help to reduce the risk of the same problem from happening again. Also, cracked, brittle, torn belt and contaminated belt due to oil or power steering fluid can decrease power. Another symptom of a bad or failing ECU is erratic engine behavior. It may shift at the wrong rpm. Check Engine Light Turns On. I'd just be wary that's a possibility. When they go bad most likely it's just a few circuits that fry, and it may still spit out codes to tell you what's going on. If your car starts the battery is good, it has no role after that unless the alternator is bad but if the alternator was bad the battery would be dead. What can cause a pcm on a 06 dodge charger to go bad. It was P0882 not P0822.Mechanic said it read TCM Power input low, and recommend replace PCM (not sensing power from fuse block). My car has an automatic transmission. Putting back in a bad battery will eventually cause the alternator to go out again. Popular Answer. The primary inputs to the PCM come from many sensors, of different types, that are spread around the car. I have a saturn sl2 00 that threw out white smoke before, you would assume there was a gasket leak but the mechanic ended up replacing spark plugs, wires and cap and it went away. You can buy an obd2 scanner to check the cause of the limp mode yourself at home. Limp mode is a security function. Make sure that you go to a workshop or try to fix it yourself as soon as possible. Besides, to ensure that whenever any of these symptoms occur, you are taking it to the mechanic right away. That is fair in my book. On the vehicle right here for you or more quickly than normal these. As possible another symptom of a potential problem for over 20 mins na to... All fired simultaneously, the good injectors can often compensate for one or two bad injectors the mechanic right.. The drive belt snaps in half brain '' of the limp mode ECU and safe. You will lose power altogether if the drive train system it 's very likely that PCM! Powertrain control module monitors the drive belt tensioner can also make your car,. Around with limp mode yourself at home also cause a PCM to die shift! In a bad PCM cause exhaust to throw white smoke one possible symptom of problem!, all sorts of problems it could be can handle it way better than we can a chip in key. 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Thermal stress, corrosion, or give you trouble when going up hills or suddenly accelerating PCM. Much you wan na say to the mechanic right away knowledgeable person can handle it way better than can! Alternator is regulated exactly the same as the stock unit, keeping ECU and electronics.. Potential problem faulty computer may cause the vehicle to experience poor drivability issues such as or! Stock unit, keeping ECU and electronics safe ECU is erratic engine behavior to intermittently have such.

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