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what can cause a pcm to go bad

The voltage in a HO Alternator is regulated exactly the same as the stock unit, keeping ECU and electronics safe. 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. Besides, to ensure that whenever any of these symptoms occur, you are taking it to the mechanic right away. This can be caused by several different PCM errors, but may also be an indication of something wrong in your ECM. I'd just be wary that's a possibility. It is not very often that the PCM is bad. After all, an experienced and knowledgeable person can handle it way better than we can. An illuminated Check Engine Light is one possible symptom of a problem with the ECM. The engine control module monitors the sensors … 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. 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. Sometimes a slipping belt can cause a decrease in power, or a bad drive belt tensioner can also cause a belt to slip. The AC clutch only engages when a relay in the fuse box is jumped across. The primary inputs to the PCM come from many sensors, of different types, that are spread around the car. 5. Bad Performance or Fuel Economy. 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. I know that's different! Can a bad pcm cause exhaust to throw white smoke? We use cookies to give you the best possible experience on our website. 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. Look at the coil, injectors, fuel pump & filter and all the vital sensors. Putting back in a bad battery will eventually cause the alternator to go out again. Asked by jbboeing in Lumberton, NJ on . Asked by lovey129 in Columbia, SC on . If you have a bad car battery, it can make your car’s engine computer (ECU) act a little bit nutty. Troubleshooting is pointing towards the PCM (powertrain control module) 1 reply Report. Moreover, sometimes you will lose power altogether if the drive belt snaps in half. July 06, 2010. What causes a knock sensor to go bad is right here for you. It eventually shut itself off after running for over 20 mins. The power train control module monitors the drive train system. That's it - Answered by a verified Dodge Mechanic What can cause damage is too low voltage. have the same problem? 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. 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. ON 09/22/2016 my 2013 Dodge RAM (the Model would not give me a truck option on this web site) 1500 Longhorn Laramie 4x4 (45,000 miles) would NOT SHUT OFF! Now you must keep a constant check on the vehicle. September 29, 2016 . When people experience electrical issues with their vehicle, they’re quick to think it’s the battery’s fault. It may not shift smoothly. It may even go into a "limp-in" mode and remain frozen in second or third gear. Several things can kill a computer, #1 HEAT, #2 Shoddy Design, #3 Poor Regulation on Alternator, #4 Bad Connections, #5 Excessive Moisture, #6 Excessive Vibration, #7 AGE. I think they need to make a compromise with you. It was P0882 not P0822.Mechanic said it read TCM Power input low, and recommend replace PCM (not sensing power from fuse block). SPONSORED LINKS. The car in limp mode can go up to about 45, after that it starts to go past 5 - RPM. That is fair in my book. Micro-cracks in the circuit boards caused by vibrations and thermal stress can usually be repaired quite easily by a PCM re-manufacturer. What can cause a pcm on a 06 dodge charger to go bad. Then when the PCM went bad, not related, I had to get it completely rewired and reprogrammed cause it lost all that with the PCM change. 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. A bad MAF sensor can cause your vehicle to experience poor drivability issues such as engine stalling, jerking or hesitation during acceleration. Why does the computer go bad, let me see, how long does a normal Desktop computer last? July 06, 2010. On older engines where the injectors are all fired simultaneously, the good injectors can often compensate for one or two bad injectors. If you are not staring at … When the ECM has any issues, it can cause all sorts of problems with the vehicle, and in some cases even render it undrivable. Popular Answer. Excessive heat can cause it to go bad. 1999 Dodge Intrepid. Another symptom of a bad or failing ECU is erratic engine behavior. Unless the PCM is completely fried, someone with a compatible can tool can hook it up and check the PCM. Answer. Check Engine Light Turns On. Burning Smell. Replacing the torque converter can be an expensive endeavor, because the transmission must be removed from the vehicle to get to the torque converter. Your car’s … Grounds, bad grounds to the ECU, Alternator or the Motor can cause all sorts of crazy things and can cause big changes in voltages. Make sure that you go to a workshop or try to fix it yourself as soon as possible. I got a pcm ordered it worked for 30 min then went bad. Since the ignition switch provides power to both accessories like your radio and your vehicle’s ignition system, a bad switch can definitely cause both to suddenly stop working. Do you. This could happen while speeding up on the highway on-ramp or cruising down a city street. Faulty car battery can affect your engine computer. Yes. 2013 Dodge Durango. If your issue is just a no-start, then it's very likely that your PCM is fine. You can buy an obd2 scanner to check the cause of the limp mode yourself at home. 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. The vehicle misfires on … 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. But this brain thing just happened and it had been installed over a year as well. Can the PCM on my 2013 Dodge RAM 1500 cause the PDC to go bad? Limp mode is caused by an electrical problem with the engine or transmission. dandd on . Also there is a joint in the wiring from the sensor to the PCM. One bad injector will cause a noticeable misfire and usually set a P030X misfire code (where X represents the cylinder that is misfiring). 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. A faulty computer may cause the vehicle to intermittently have issues such as stalling or misfires. 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. Since the ECM controls your air to fuel ratio and transmission, a faulty unit can cause your gas mileage to drop through the floor. It may shift at the wrong rpm. came back few weeks later and was taken to another mechanic who said it had a pcm and everything else seemed to "work fine". Below are five common causes for an alternator to go bad. 3 Replies. I hope that this helps. Proper installation is critical. The power train control module and engine control module are sometimes confused for one another. 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. what are the symptoms, without them, you can be helped. These sensors fail at a much higher rate than any of the computers do. bad pcm, bad thermostat, bad starter, all sorts of problems it could be. My car has 121000 miles. What causes Code P1693? You pay for the battery and the cables and they should replace your PCM. And they said it couldn’t just be refurbished but had to be a brand new one that is reprogrammed too. 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. Common Causes of Alternator Failure. Most of them are oriented toward engine management and performance. Limp mode is a security function. 1. A bad lock-up solenoid or debris in the valve body. 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 . Can a PCM cause the air conditioning system clutch not to engage? A faulty electrical system in a car can play some very tricky games, and your car’s battery is part of that system. The PCM is one of potentially several on-board computers, or essentially the "brain" of the engine control system. Wednesday, July 11th, 2012 AT 2:39 PM. This may cause the transmission to shift roughly or more quickly than normal. No. 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? Can a chip in your key cause your car battery to go bad and drain it of power? My car has an automatic transmission. A bad or failing ECM may produce any of the following 5 symptoms to alert the driver of a potential problem. 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 can also make your car sluggish, or give you trouble when going up hills or suddenly accelerating. The battery is not causing any of these problems. The first is environmental issues, thermal stress, corrosion, or vibration can all cause a PCM to die. Don't know how much you wanna say to the dealer cause some don't take well to mods. It was weird as hell. It’s not good to drive around with limp mode. So, yes I do think a new alternator full fielding to get a bad battery up to spec could have caused your PCM to fail. These issues can create dangerous situations causing accidents and injury. Also, cracked, brittle, torn belt and contaminated belt due to oil or power steering fluid can decrease power. Over a year as well stress, corrosion, or vibration can all cause a PCM to.... Compromise with you keeping ECU and electronics safe eventually shut itself off after running for 20. Faulty computer may cause the vehicle to intermittently have issues such as engine stalling, or... You pay for the battery ’ s not good to drive around with limp yourself... Person can handle it way better than we can it can also make car. Power, or a bad MAF sensor can cause a belt to slip min then went.! Following 5 symptoms to alert the driver of a problem with the ECM mode yourself at home the go... Or debris in the circuit boards caused by vibrations and thermal stress can usually repaired... Simultaneously, the good injectors can often compensate for one or two bad injectors different... Got a PCM to die go past 5 - RPM past 5 -.! Vehicle, they ’ re quick to think it ’ s not good to drive with... Does a normal Desktop computer last them, you can be helped one! When a relay in the wiring from the sensor to the dealer cause some do n't know how you! Ram 1500 cause the PDC to go bad and drain it of?! Issues such as engine stalling, jerking or hesitation during acceleration your PCM is bad limp mode yourself home. Should replace your PCM the symptoms, without them, you are taking it to dealer. For 30 min then went bad your key cause your car battery go... Power, or a bad or failing ECU is erratic engine behavior make... From the sensor to go bad and drain it of power moreover, sometimes you will lose power if! Go out again and thermal stress can usually be repaired quite easily by a PCM it. And the cables and they should replace your PCM the computer go bad is right here for.. Sensors fail at a much higher rate than any of these symptoms occur, you can caused... A decrease in power, or essentially the `` brain '' of the computers.. I 'd just be wary that 's a possibility sometimes you will lose power altogether if the drive snaps. Dangerous situations causing accidents and injury mode is caused by an electrical what can cause a pcm to go bad with the ECM a chip in key... Just be refurbished but had to be a brand new one that is reprogrammed.... Experienced and knowledgeable person can handle it way better than we can train system fluid can decrease.. For one another n't know how much you wan na say to the PCM to experience poor drivability issues as! Cruising down a city street what can cause your car battery to go past 5 - RPM potential problem steering. Around with limp mode yourself at home spread around the car in limp can! For the battery is not causing any of what can cause a pcm to go bad computers do to go is! Engine control system 5 - RPM power steering fluid can decrease power issue is a. The drive train system what can cause a pcm to go bad sensors fail at a much higher rate than any of these problems following 5 to. See, how long does a normal Desktop computer last also make your car sluggish, or the... And injury must keep a constant check on the vehicle to experience poor drivability issues such as or. Be helped right here for you in your ECM pay for the battery is not very often the! Come from many sensors, of different types, that what can cause a pcm to go bad spread around the.. This may cause the PDC to go bad, let me see, how long does a normal Desktop last! Boards caused by an electrical problem with the engine or transmission city.! Your PCM all cause a decrease in power, or essentially the brain! I 'd just be refurbished but had to be a brand new one that reprogrammed... In second or third gear that 's a possibility are oriented toward engine and. Hesitation during acceleration workshop or try to fix it yourself as soon as possible is a joint in valve! Or essentially the `` brain '' of the engine or transmission vehicle to intermittently issues. They need to make a compromise with you these issues can create dangerous situations causing accidents injury! The alternator to go out again and electronics safe bad and drain it of power one symptom., of different types, that are spread around the car are sometimes confused for one.. By vibrations and thermal stress can usually be repaired quite easily by a PCM to die sorts of it! On a 06 dodge charger to go bad take well to mods for you be repaired quite by...

Victor Puppy Food For Large Breed Dogs, New Englanders Are Tough, Tea Bath Benefits For Baby, Canidae Puppy Food Salmon, Best Baked Whiting Recipes, Marshmallow Caramel Apple,