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Giving code 601 - 2002 Chevrolet TrailBlazer

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This is a memory error. Have the code erased and see if it comes up again. If it does then the ECM is bad. this can also be reset by disconnecting the battery for 30 minutes. But I am sure you will have to have the code erased.

Posted on May 18, 2011

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Internal module check sum error You will probably need to replace your ECM It should cost around $100-$150 at autozone or oreillys

Posted on May 18, 2011

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Error code P0601

Depending on the make model and year, code 601 usually means there is an internal problem with the engine computer.

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601 is internal memory code.
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Code 601 is a problem with the engine computer. The computer would need to be tested and probably replaced.

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Code 601 EEPROM/PCM Problem what does this mean

ECM failures occur when the system ground is not reliable...those three hundred amp starts share the same access point as the ECM..."weld" themselves into position for a "brown out" condition that to the ECM makes them dysfunctional....a renewed ground attachment with takin' the 1/0 cable off and wirebrushing the spot where is was bolted in to establish reliable ground will make the failures disappear~

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Code 601 is an internal problem with the engine computer.
The computer would probably need to be bench tested and maybe replaced.

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Code 601 PCM

Code 601 means the computer or the controller card for it is failing. You should take it to a authorized technician to have it replaced.

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Has 601 code were is this located

Code 601 is saying one of the controller circuits in the computer has failed.
You may need a shop or a dealer to find out for sure.

Jul 11, 2012 | 2002 Dodge Grand Caravan

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601 code ..internal control module memory check sum error..what does this mean

It means the PCM (computer) is toast. Replace it with one from a wrecking yard if available.

Sep 26, 2009 | 2002 Jeep Grand Cherokee

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2001 jeep grand cherake limeted 4.7 motor I instaled new timing chain kit after all back together it was hard to start but started and drove like new parked it 2 days later it would not start giveing me a...

601 is code for main computer...Check harness to make sure that it's connected well and that pins are clean and straight. Try swapping it out for a known good one if you can. Don't know why it went down like that but that's what the code to believe it sometimes! I'd also check around where you were working to make sure you haven't pinched or disconnected any wiring (doubtful)
good luck

Apr 04, 2009 | 2004 Jeep Grand Cherokee

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