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