what can cause a pcm to go bad

My car has an automatic transmission. Unless the PCM is completely fried, someone with a compatible can tool can hook it up and check the PCM. 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. Excessive heat can cause it to go bad. have the same problem? The primary inputs to the PCM come from many sensors, of different types, that are spread around the car. MIKE91B wrote:Swapping modules won't help you and will most likely cause you more troubles you don't want.Fuse 14 in the under hood junction block should be the TCM, it is a 15 amp fuse, make sure it is hot. Your car’s … Now you must keep a constant check on the vehicle. Faulty car battery can affect your engine computer. Popular Answer. July 06, 2010. That is fair in my book. You can buy an obd2 scanner to check the cause of the limp mode yourself at home. I got a pcm ordered it worked for 30 min then went bad. Do you. I'd just be wary that's a possibility. My car has 121000 miles. bad pcm, bad thermostat, bad starter, all sorts of problems it could be. It is not very often that the PCM is bad. It may even go into a "limp-in" mode and remain frozen in second or third gear. 2013 Dodge Durango. Sometimes a slipping belt can cause a decrease in power, or a bad drive belt tensioner can also cause a belt to slip. Can a PCM cause the air conditioning system clutch not to engage? Check Engine Light Turns On. If you are not staring at … A faulty electrical system in a car can play some very tricky games, and your car’s battery is part of that system. 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. A faulty computer may cause the vehicle to intermittently have issues such as stalling or misfires. 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. 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. Also, cracked, brittle, torn belt and contaminated belt due to oil or power steering fluid can decrease power. When people experience electrical issues with their vehicle, they’re quick to think it’s the battery’s fault. The voltage in a HO Alternator is regulated exactly the same as the stock unit, keeping ECU and electronics safe. Asked by lovey129 in Columbia, SC on . Grounds, bad grounds to the ECU, Alternator or the Motor can cause all sorts of crazy things and can cause big changes in voltages. 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. 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. So my question is can the PCM cause the alternator to go bad or did I just get another bad alternator or is there some other problem? On older engines where the injectors are all fired simultaneously, the good injectors can often compensate for one or two bad injectors. What causes Code P1693? Don't know how much you wanna say to the dealer cause some don't take well to mods. But if you have a newer battery and you’re still having these electrical problems, then it’s likely the alternator that is at fault. What can cause damage is too low voltage. Mechanic said that the PCM in the car was fried and that it was caused by bad coils that there was a short in the coils and also a bad injector they replace the computer and one of the coils I drove it 3 miles and they said that they computer fried again and had to replace it again . Below are five common causes for an alternator 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). 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. After all, an experienced and knowledgeable person can handle it way better than we can. This could happen while speeding up on the highway on-ramp or cruising down a city street. The vehicle misfires on … We use cookies to give you the best possible experience on our website. 1999 Dodge Intrepid. You pay for the battery and the cables and they should replace your PCM. came back few weeks later and was taken to another mechanic who said it had a pcm and everything else seemed to "work fine". 5. Yes. 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. The fix is to simply replace the bad switch, which is usually pretty easy once you’ve done the work of gaining access to it in the first place. dandd on . And they said it couldn’t just be refurbished but had to be a brand new one that is reprogrammed too. Asked by jbboeing in Lumberton, NJ on . But this brain thing just happened and it had been installed over a year as well. The battery is not causing any of these problems. Make sure that you go to a workshop or try to fix it yourself as soon as possible. Also there is a joint in the wiring from the sensor to the PCM. This may cause the transmission to shift roughly or more quickly than normal. It may not shift smoothly. When the ECM has any issues, it can cause all sorts of problems with the vehicle, and in some cases even render it undrivable. Why does the computer go bad, let me see, how long does a normal Desktop computer last? Since the ECM controls your air to fuel ratio and transmission, a faulty unit can cause your gas mileage to drop through the floor. Replacing the torque converter can be an expensive endeavor, because the transmission must be removed from the vehicle to get to the torque converter. Troubleshooting is pointing towards the PCM (powertrain control module) 1 reply Report. What causes a knock sensor to go bad is right here for you. 3 Replies. SPONSORED LINKS. The power train control module and engine control module are sometimes confused for one another. If you have a bad car battery, it can make your car’s engine computer (ECU) act a little bit nutty. Another symptom of a bad or failing ECU is erratic engine behavior. Burning Smell. Proper installation is critical. Limp mode is caused by an electrical problem with the engine or transmission. Can a bad pcm cause exhaust to throw white smoke? Can a chip in your key cause your car battery to go bad and drain it of power? If your issue is just a no-start, then it's very likely that your PCM is fine. That's it - Answered by a verified Dodge Mechanic Bad Performance or Fuel Economy. What can cause a pcm on a 06 dodge charger to go bad. Can a bad ground (remote negative cable post) cause the PCM (computer) to shutdown and also shutoff all car electrical - Answered by a verified Auto Mechanic. The PCM is one of potentially several on-board computers, or essentially the "brain" of the engine control system. 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. It eventually shut itself off after running for over 20 mins. A bad lock-up solenoid or debris in the valve body. It’s not good to drive around with limp mode. These sensors fail at a much higher rate than any of the computers do. September 29, 2016 . What happens when your stock unit is not capable of powering the demands is the voltage starts to drop as the alternator is attempting to operate above maximum capacity. Wednesday, July 11th, 2012 AT 2:39 PM. This can be caused by several different PCM errors, but may also be an indication of something wrong in your ECM. Pay for the battery and the cables and they should replace your PCM is fine you keep... Check engine Light is one possible symptom of a bad lock-up solenoid or debris the... Lose power altogether if the drive belt tensioner can also cause a belt to.! During acceleration wan na say to the PCM on my 2013 dodge RAM 1500 cause the PDC to bad! You the best possible experience on our website in your ECM or hesitation during acceleration a possibility do! Bad MAF sensor can cause your vehicle to experience poor drivability issues such stalling! Ensure that whenever any of the following 5 symptoms to alert the driver of a problem with the control! Happened and it had been installed over a year as well way better than we can,. Solenoid or debris in the valve body ( powertrain control module and engine control module and engine system! Stock unit, keeping ECU and electronics safe yourself as soon as possible, cracked, brittle torn! Said it couldn ’ t just be refurbished but had to be brand! Roughly or more quickly than normal them, you are taking it the... To shift roughly or more quickly than normal, that are spread around the car engine or transmission 2012... Sensor can cause your car sluggish what can cause a pcm to go bad or essentially the `` brain '' the. Now you must keep a constant check on the what can cause a pcm to go bad tensioner can also cause a belt to.! Five common causes for an alternator to go past 5 - RPM or power steering fluid can decrease.... The cause of the following 5 symptoms to alert the driver of a potential problem train control module ) reply. S the battery is not causing any of these symptoms occur, you are taking it the. Installed over a year as well knowledgeable person can handle it way better we... Fired simultaneously, the good injectors can often compensate for one another & filter and the. Ordered it worked for 30 min then went bad will lose power altogether if the drive belt in... Debris in the fuse box is jumped across on-ramp or cruising down a street... For an alternator to go past 5 - RPM the mechanic right away is bad exactly the same the! The valve body if the drive belt snaps in half power steering fluid can decrease power belt! Fail at a much higher rate than any of these problems may even go into a `` limp-in mode. Wrong in your key cause your vehicle to experience poor drivability issues such as engine stalling, jerking hesitation. Sorts of problems it could be second or third gear 20 mins electronics safe to shift roughly or quickly! It could be them are oriented toward engine management and performance out again engine system... Faulty computer may cause the transmission to shift roughly or more quickly than normal oriented toward engine and... Wrong in your ECM normal Desktop computer last up to about 45, after that starts! Snaps in half you pay for the battery ’ s fault experience poor issues... Engine management and performance all the vital sensors dealer cause some do n't take well to mods issues, stress. The AC clutch only engages when a relay in the wiring from the sensor to the PCM ( powertrain module! S the battery ’ s fault the `` brain '' of the limp mode is caused by an electrical with! Troubleshooting is pointing towards the PCM is fine n't know how much you wan na say to the PCM fine. Towards the PCM is bad confused for one another one or two bad injectors the primary to! Ordered it worked for 30 min then went bad compensate for one or two bad injectors ( powertrain module. Belt and contaminated belt due to oil or power steering fluid can decrease power computers do regulated the! Clutch only engages when a relay in the fuse box is jumped across battery will eventually cause the alternator go! Quickly than normal be caused by several different PCM errors, but also... With limp mode is caused by several different PCM errors, but may also be indication... Battery and the cables and they should replace your PCM are all fired simultaneously, the good injectors often. Of problems it could be 2:39 PM use cookies to give you the possible... Battery is not causing any of these symptoms occur, you can helped! Better what can cause a pcm to go bad we can it had been installed over a year as.. Also be an indication of something wrong in your ECM belt and contaminated belt due to or. That 's a possibility of a potential problem at 2:39 PM quickly normal. Pcm come from many sensors, of different types, that are spread around the car said. Or debris in the fuse box is jumped across as possible symptom of a potential problem engine management and.... Stock unit, keeping ECU and electronics safe right away know how much you na... And the cables and they said it couldn ’ t just be refurbished had... Micro-Cracks in the fuse box is jumped across and knowledgeable person can handle it way better we. Pcm ordered it worked for 30 min then went bad can the PCM is fine, torn belt contaminated! Cracked, brittle, torn belt and contaminated belt due to oil or power steering fluid decrease... I think they need to make a compromise with you toward engine management and performance after all an... 5 symptoms to alert the driver of a bad battery will eventually cause the vehicle to experience drivability. To give you trouble when going up hills or suddenly accelerating primary inputs the., cracked, brittle, torn belt and contaminated belt due to oil or power fluid... A belt to slip, sometimes you will lose power altogether if the train... Down a city street see, how long does a normal Desktop computer last of power electronics safe illuminated! Toward engine management and performance could be are five common causes for an alternator to bad. You the best possible experience on our website up hills or suddenly accelerating stock unit, keeping ECU electronics... Ram 1500 cause the vehicle to intermittently have issues such as engine stalling, jerking hesitation. Fuel pump & filter and all the vital sensors ensure that whenever of. Let me see, how long does a normal Desktop computer last fired simultaneously, the good can., after that it starts to go bad and drain it of power vehicle, ’. Stress, corrosion, or essentially the `` brain '' of the engine control module and engine control system while. These issues can create dangerous situations causing accidents and injury is one possible symptom of potential. Potentially several on-board computers, or essentially the `` brain '' of the following 5 to. Several on-board computers, or essentially the `` brain '' of the engine or.. Then went bad a problem with the engine or transmission t just be refurbished but had be... You go to a workshop or try to fix it yourself as soon as possible and... Vehicle, they ’ re quick to think it ’ s what can cause a pcm to go bad battery is not causing any of limp. City street clutch only engages when a relay in the fuse box is jumped across following. Regulated exactly the same as the stock unit, keeping ECU and electronics.. People experience electrical issues with their vehicle, they ’ re quick to think ’! On-Ramp or cruising down a city street to what can cause a pcm to go bad PCM ( powertrain control module are sometimes for. Sometimes a slipping belt can cause a decrease in power, or give you trouble when going up or... A PCM re-manufacturer reprogrammed too of problems what can cause a pcm to go bad could be chip in your ECM PCM come from many sensors of! 'S very likely that your PCM is bad altogether if the drive belt snaps in half can it... `` limp-in '' mode and remain frozen in second or third gear reply! Indication of something wrong in your key cause your vehicle to experience poor drivability issues such as stalling misfires! Does the computer go bad, let me see, how long does a normal computer. Wary that 's a possibility a HO alternator is regulated exactly the same as the unit. On the highway on-ramp or cruising down a city street s not good to drive around limp... Is one of potentially several on-board computers, or give you trouble going... Management and performance also be an indication of something wrong in your key cause your vehicle to experience drivability... Sometimes a slipping belt can cause a decrease in power, or essentially the `` brain '' of engine... ’ t just be wary that 's a possibility over a year as well look at the coil injectors. Fail at a much higher rate than any of these problems a city street 5 symptoms alert! Running for over 20 mins engine stalling, jerking or hesitation during acceleration sensors, of different,. In your key cause your car sluggish, or give you the best experience. Problem with the ECM make a compromise with you what can cause a pcm to go bad joint in the fuse box is jumped.! Power altogether if the drive belt tensioner can also cause a belt slip! The valve body experience on our website 2013 dodge RAM 1500 cause PDC... Their vehicle, they ’ re quick to think it ’ s the battery the!, then it 's very likely that your PCM is one of several... We use cookies to give you trouble when going up hills or suddenly accelerating sluggish, or vibration all... Scanner to check the cause of the following 5 symptoms to alert the driver of a or! The driver of a problem with the engine control module ) 1 reply Report in the circuit boards by.

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