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My programmer says my PCM needs service what does that mean and how do I fix it

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You will neeed to see the dealer on this.

Posted on Dec 18, 2012

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Where the ecm/pcm located on a chevy avalanche 2002


The pcm is just under the battery on the left side of the engine compartment. The PCM need to be calibrated to the truck and motor. If you just put it in the motor may not start. Read over the information I have attached before you do this. Ken Powertrain Control Module Replacement Service of the powertrain control module (PCM) should consist of either replacement of the PCM or electrically erasable programmable read only memory (EEPROM) programming. If diagnostic procedures call for the PCM to be replaced, the replacement PCM should be checked to ensure that the correct part is being used. If the correct part is being used, remove the faulty PCM and install the new service PCM.
Important: To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM. For example, when working with a battery cable, PCM pigtail, PCM fuse, or jumper cables. • Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM. • The replacement PCM must be programmed.

Removal Procedure

    Important: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

Nov 30, 2016 | Cars & Trucks

2 Answers

2003 jeep liberty 3.7 po605 code what could be the problem


An internal computer problem. Read only memory. This is the factory defaults. These can't be erased by a tech. But can be by a system fault. You can get the computer online for about $160. Plug and play. Dealers 2 to 3 times this.

Oct 08, 2016 | 2003 Jeep Liberty

1 Answer

My 2003 buick century custom has dashboard lights on--how to reset Service Vehicle Soon, Trak light off, Abs light?


You need to have it checked for DTC'S - diagnostic trouble codes to see what the problem is ,then diagnosed , then fixed ! Then the light's will go off ! This means taking it to a qualified repair shop .
SERVICE VEHICLE SOON
The IPC illuminates the SERVICE VEHICLE SOON message in the DIC when the powertrain control module (PCM) detects certain malfunctions that are not related to the emissions system. The IPC receives a class 2 message requesting illumination from the PCM.

Sep 08, 2016 | 2003 Buick Century

2 Answers

Hi, what does P0605 mean?


this answer courtesy of obd-codes.com code p0605 What does that mean? This trouble code basically means that the PCM/ECM (powertrain/engine control module) has detected an internal control module fault in the ROM (read only memory) in the PCM. The PCM is basically the vehicle's "electronic brain" that controls functions such as fuel injection, ignition, etc. When self-checks fail in the ROM, this DTC is set. This code is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. A cursory search on the 'net shows this DTC to be more commonly found in Ford and Nissan vehicles. Symptoms Symptoms of a P0605 DTC will include MIL (malfunction indicator lamp) illumination, although there may be other symptoms including but not limited to various warning lights on dash, stalling, and no start conditions. Potential Causes There is an internal fault in the PCM / ECM Using an aftermarket performance programmer may trigger this code Possible Solutions In some cases, "flashing" the PCM with an updated software can fix this DTC. You will need acess to make & model specific information such as Technical Service Bulletins (TSBs). If there are no PCM flash updates, the next step would be to check some wiring. Inspect and check for proper voltage and ground to the PCM and throughout the associated circuits. If there are problems with them, repair and retest. If the wiring checks out OK, the next step is to replace the PCM, which is the most likely repair for this code. This is generally not a "do-it-yourself" task, although in some cases it may be. We strongly recommend you have a qualified repair shop / technician do the work, one that has the capability to reprogram the new PCM. Installing the new PCM may involve using special tools to program the vehicle's VIN (vehicle identification number) and/or anti-theft information (PATS, etc.). As an alternative to replacing the PCM, some specialized shops may actually be able to repair the PCM. That may involve removing the PCM, shipping it off to them for repair, and re-installing it. That's not always an option for daily drivers. N

Read more at: http://www.obd-codes.com/p0605
Copyright © OBD-Codes.com this answer courtesy of obd-codes.com

Jul 11, 2015 | 2011 Kia Sorento

1 Answer

Check engine light stays on after ignition turned off


MALFUNCTION INDICATOR LAMP (MIL) ALWAYS ON: CHECK MIL CIRCUIT FOR SHORTS TO GROUND IN wiring HARNESS .
    Note: If vehicle will not start, GO to A1 .
  • If any Key On Engine Off or Continuous Memory Diagnostic Trouble Codes are present, repair before proceeding.
  • Disconnect PCM.
  • Measure resistance between PCM harness connector Pin 2 and PCM harness connector Pin 51 or 103.
Is resistance less than 5.0 ohms? Yes No REPAIR short circuit. REPLACE PCM (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) ).
  • An indicator is inoperative/always on - SERVICE ENGINE SOON
  • Circuitry.
  • Bulb.
  • Instrument cluster.
  • PCM.
  • GO to Pinpoint Test P .
This is one you need to take to a repair shop , need to hook up scan tool to see if you can turn off an on check engine light , could have a wiring problem , cluster or engine computer problem !

Mar 16, 2015 | 2002 Ford Mustang

1 Answer

I replaced pcm


only a service dealer can reprogram the PCM to your keys or your keys to the PCM they need both units connected up to the code programmer to do this.

Jan 19, 2014 | 2001 Ford Mustang GT

1 Answer

My 1999 ford f250 7.3 diesel is due for a smog this month and my service engine soon light stays on. I have 2 codes come up, P0603 and P0470, I'm assuming thats why the light is on. What can I do to fix...


This is what I found out for your two codes;

P0603 is a KAM error where the PCM is forgetting everything it has learned about its driving strategy. This is normally a result of using a programmer or having used a programmer in the past. This one can be overlooked for now.

P0470 means you have a exhaust back pressure sensor concern.

Basically, you will have to inspect, test and maybe replace that back pressure sensor.

Jan 25, 2011 | 2002 Ford F250 Super Duty SuperCab

1 Answer

HOW DO YOU REPLACE THE ON BOARD COMPUTER OF A 2004 CHEVY TRAILBLAZER


Service of the powertrain control module (PCM) should normally consist of either replacement of the PCM or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures call for the PCM to be replaced, the PCM should be inspected first to see if the correct part is being used. If the correct part is being used, remove the faulty PCM and install the new service PCM.
Important: To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM. For example, when working with a battery cable, PCM pigtail, PCM fuse, or jumper cables.
Important: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.
Removal Procedure
    Important: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. jsmes1027_23.gif
Loosen the PCM harness connector bolts (4) from the center of the PCM harness connectors.
Notice: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.
Remove the PCM harness connectors (2) from the PCM (1).
Remove the PCM retaining bolts (3) and nuts (6).
Notice: Do not touch the connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage to the PCM.
Slide the PCM (1) away from the intake manifold past the mounting studs (5) and remove PCM from the vehicle.
Remove the PCM mounting studs (5) from the intake manifold ONLY if replacing the studs.


It is possible that the pcm made need to reflashed after replacement.

Nov 27, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

Code no. 113 and 603 came up on the computer for my 2001 Ford diesal truck. What does the code refer to?


P0113 means you have an open circuit in intake air sensor area, or a bad PCM.

Is your intake air sensor unplugged? That would definitely cause that code. It's unlikely your PCM is bad.

The P0603 is because of your programmer and isn't anything to worry about. It just means the programmer has interrupted power to the internal memory when it uploads the new program.

Oct 19, 2010 | 2008 Ford F-350

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