2004 Pontiac Grand Prix Logo
Anonymous Posted on Oct 31, 2010

Reduced engine power is displayed on meassage center, diognostic code - P0606 what is the code? im told its the ECM Processor is that correct and if so whats the cheapest solution to repare

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  • Contributor 34 Answers
  • Posted on Nov 03, 2010
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This pretty much means that your computer has failed. The engine will go into limp mode at this point, as you have noticed. You need to have the computer tested, but really the only way to do this is at a dealership. Most mechanics won't have the right tools. A dealership might be able to reset your computer and get you going again. You should be prepared, tough, to hear that your computer is shot and can not be fixed. In that case, you're looking at $600-$800 for the part it's self.

However, you can try to monkey around yourself. Disconnect the wiring harness from the PCM and make sure both connectors are clean. Reconnect the wiring harness. Go around the engine and make sure all ground connections are clean and tight. A bad ground in the wrong spot and really mess with the computer too. I wish I could be more specific, but it's really a matter of just hunting around the engine and making sure everything is tight and clean.

Testimonial: "Thanks for the advice. Will try your suggestions."

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P0606 OBD-II Trouble Code: PCM Processor Fault

What the P0606 code means

The Powertrain Control Module is sometimes referred to as the Power Control Module, or the Engine Control Module (ECM); all of these names mean the same thing. The PCM is responsible for monitoring every aspect of the vehicle's engine and electrical system.

When the vehicle is started up, the PCM will perform a self-check to make sure that all of the engine's components are operating properly. If the result of this self-check indicates that there is a processor fault in the the PCM, it will store the P0606 diagnostic trouble code.

What causes the P0606 code?
•PCM wires that are broken, corroded, and/or frayed
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https://www.google.com/search?q=code+p0606+on+a+kubota+mx5200&rlz=1C1QJDB_enCA643CA644&oq=code+p0606+on+a+kubota+mx5200

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Your vehicle has electronic throttle control , controlled by the engine computer .Do you have any messages come up on the DIC - driver information center Reduced Engine Power
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Hi there:
P0606 is a internal computer fault. Sometimes extreme hot or cold weather will screw up a computer.




P0606 - PCM / ECM Processor Fault
This code is a fairly simple one. It basically means that the PCM/ECM (powertrain/engine control module) has detected an internal integrity fault in the PCM. When this code is activated it should store freeze-frame data that helps someone with an advanced code scanning tool to get information on exactly what was going on with the vehicle when the P0606 code was triggered.



Most likely the only symptom of a P0606 DTC code is the illumination of the "Check Engine Light" a.k.a. MIL (Malfunction Indicator Lamp).



Cause: In all likelyhood the PCM / ECM has failed.


Possible Solutions: As a vehicle owner there is little you can do to fix this code. The most common fix for a P0606 code is to replace the PCM, although in some cases re-flashing the PCM with updated software could possibly fix this. Be sure to check for TSB's on your vehicle (Technical Service Bulletins).


In all likelyhood the fix is to replace the PCM. 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.).


NOTE: This repair may be covered under the emissions warranty so be sure to check with your dealer as this may be covered beyond the bumper-to-bumper or powertrain warranty period.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.
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