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pcm

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Question
Starts for a second, dies, and won't start again unless you disconnect battery.
Hi there. The symptoms that you are having seems to be with a faulty PCM (powertrain control module, computer). If you are able to reset the computer by disconnecting the battery, then restart the vehicle, there is an issue with...
Question
can I use the positive and negative posts under the hood to maintain power to the computer while replacing main battery
If the two posts are indeed specified for jump starting, then the answer is "yes" you can safely install a 12 volt car battery there at the remote posts while you remove and replace the permanent car battery. Electrically, all...
Question
When replacing the ecu, do I have to have it programmed upon installation?
The PCM will need to be programmed if you have theft system that is factory installed. The PCM will need to be programmed to communicate with the theft module.
Question
If my 2004 Nissan Pathfinder is showing a p1273 code, can you fix it?
Diagnostic Trouble Code (DTC) P1273 sets if lean operation is detected. There are quite a few causes but if you have already replaced the oxygen sensor, the ECM has to be cleared of stored "self-learned" mixture ratios, and the DTC...
Question
Need to swap engine from 2002 eclipse into 2006 eclipse
The 2002 engine used Head Cast # G6 and Block Cast # 4G64. The 2006 used Head Cast # G69M and Block Cast # 4G69. There are other differences between the two years as well. The principal problem is your...
Question
Do you need to reprogram after replacing throttle body on 04 trailblazer
The Service Manual does not "require" any specific intervention (re-learn procedure). On this vehicle, the PCM will, by default, update itself to new values, just as you idle and drive the vehicle, if such new values are required. Even if...
Question
I have had battery problems in my 2002 Dodge Neon and now need a computer. Are they related
Hello. If the vehicle was jumped improperly at any point then that would definitely cause the PCM to fail. If the voltage was incorrect or if the jumper cables were installed incorrectly then this will occur. I would also recommend...
Question
i cannot find a used engine for my truck,will a engine from a grand marquis fit in the truck?
I looked up the two applications. Those two engines use completely different castings for both the heads and the block and the flywheel (flex plate) is different as well which will make it incompatible with your transmission. If you search...
Question
Solving electrical problem resulting from reversed battery terminals
Reverse polarity, at the battery, in a 12 volt electrical system on a car can cause a variety of effects including damaging the alternator, diodes and the numerous microprocessors on a vehicle like those in the powertrain control module (PCM)....
Question
Electrical - car battery positive temporarily touched negative - where is the problem?
Reverse polarity, at the battery, in a 12 volt electrical system on a car can cause a variety of effects including damaging the alternator, diodes and the numerous microprocessors on a vehicle such as those in the powertrain control module...
Question
Are the powertrain control modules in a 2004 Dodge Ram and 2008 Dodge Ram the same?
The powertrain control module (PCM) part numbers for the 2004 and 2008 model year trucks are different. So, it's possible that the PCM could be the problem. However, there are countless things that could have gone wrong with an engine...
Question
Can bad coils fry that computer the PCM
OBD-II PCMs have circuit protection to take account of the possibility of shorted actuators (fuel injectors, coil drivers) and other electrical overloads. Statistically, the PCM is probably the most reliable component on the entire vehicle. If the cause of the...
Question
Need to know if i need a new pcm
Without knowing the codes received and the pinpoint test you are doing or the type of chip used I would not be able to say the PCM should be replaced with the information provided. You would not normally see more...
Question
Used pcm
If you are wanting to replace the PCM, you can get one from the dealership or any parts store that supplies PCM's. Then you will need to have the PCM flashed (programmed) to your vehicle so the vehicle can operate...
Question
Mis-fire
Carefully check the EGR system. If EGR is stuck open you can get global misfiring. Check integrity of PCV system. The fuel system needs to be ruled out including the mundane, but real, possibility that you have a tankful of...
Question
question
The security system warning light should not illuminate once the vehicle is started and you are driving. If the light does illuminate, that means there is a malfunction in the security system. Obviously, if this problem started immediately after you...
Question
The car bogs down and stalls; and has a rough idle until the i tap the upper plenum.
If the problems started after you replaced the PCM, and the first PCM did not have any known issues, you might want to begin your diagnostic by re-installing the original PCM. Seems like you did a lot of work on...
Question
what modification i need tot do to place ford engine duratec 1.8 L QQDB form a ford focus 2 on the 2007 mx 5
If the engine you are attempting to use, and its accompanying complement of sensors and controls, is not listed in the catalog as a direct interchange, the problem you are facing is the engine computers of the two engines (PCM/ECM)...
Question
how do i know if i have an bad PCM
PCM's are usually replaced at the end of a "process of elimination". That is, with most engine management control failures, there are a whole host of common causes that are evaluated first. Once that long list of most common causes...
Question
Abs, brake lights are on, and the check engine light is on. Code PO500 came up. I changed our speed sensor on the back axle as well.
There could be a wiring issue with the vehicle speed sensor from the computer to the speed sensor pigtail. If the wiring is good, then the PCM may not correctly configured for the actual tire size on the vehicle. If...

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