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P0484 OBD-II Trouble Code: Cooling Fan Circuit Over Current
Diagnostic Trouble Code (DTC): P0484 P0484 code definition When the PCM detects a voltage reading from the electric cooling fan control circuit that is either too high or too low in...
P0504 OBD-II Trouble Code: Brake Switch “A”/”B” Correlation
Diagnostic Trouble Code (DTC): P0504 P0504 code definition When a malfunction is detected in the brake light switch of a vehicle, the PCM (powertrain control module) records the P0504 code, and...
P0513 OBD-II Trouble Code: Incorrect Immobilizer Key
P0513 code definition When the P0513 trouble code appears, it indicates that the powertrain control module has found an issue with the immobilizer key ID. What the P0513 code means There...
P0516 OBD-II Trouble Code: Battery Temperature Sensor Circuit Low
Diagnostic Trouble Code (DTC): P0516 P0516 code definition The PCM stores the P0516 code when the battery temperature sensor circuit has reported a temperature reading that is lower than the preset...
P0518 OBD-II Trouble Code: Idle Air Control Circuit Intermittent
Diagnostic Trouble Code (DTC): P0518 P0518 code definition If the PCM has registered an inconsistency in the engine idle RPM; the P0518 code will be stored. What the P0518 code...

Related questions

Question
Pcm ecu car won't start
Assuming the ECM is still working enough to report problems, getting any problem codes out of the system with a code reader is your best clue at this point - whether the Check Engine Light is illuminated or not. If...
Question
What else can i do to diagnose the exact problem of my cars miss fire on the 3rd cylinder?
If electronics and fuel supply have been ruled out, the next possible cause is a mechanical issue. Have a compression test done across all 4 cylinders. If #3 is lower than the other three cylinders, it is possible there is...
Question
Can you have a bad PCM but have no check engine light on?
Hello and thank you for contacting YourMechanic. PCM's typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). If water gets inside...
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
I have a Code P0601 on the PCM. I replaced the PCM, and now I have a code P0118, code P0123, and code P0193.
Hi there, the short answer to your question is no . A PCM with a P0601 (which is a memory module error in the PCM) cannot reliably retrieve codes for the codes you list (P0118 - coolant temp sensor, P0123...
Question
My Jeep has a full battery but is not starting every time I go to start the car.
Hi there. There are several possible causes for the lightening bolt to remain on. The PCM (powertrain control module) has recognized an electrical fault in the ETC (electronic throttle control) system and disables the starter relay, creating a no crank...
Question
How do I bypass the PAT system? Or how do I bypass the anti-theft command controlled by the PCM?
The PATS system cannot be bypassed. You are required to have a coded PATS ignition key in order for the computer to turn on the spark and fuel to the engine. If you do not have a PATS programmed key...
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
What's the difference between the ECM and PCM?
The engine control module (ECM) controls all the engine functions to keep it running correctly monitoring all the sensors of the engine. The power train control module (PCM) will include multiple control modules in one case called a PCM. The...
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 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
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
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
Q: 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
Does the PCM in my 2000 Chrysler Cirrus have to be reprogrammed after replacement?
The repair information from Chrysler says an OEM level scan tool must be used to update the mileage and VIN number in the replacement PCM. If this is not done, a diagnostic trouble code (DTC) will be set. You'll want...
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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