Question about 2000 Chevrolet Cavalier

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2001 caviler scan will not read car computer

2001 Chevy caviler scan will not read cars computer ? we replaced
it .still the same not reading

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No scanner communication can be caused by many different issues. #1 be sure you have power and ground at the diagnostic connector. Many times this power supply in on the "cigar" fuse or "accesory" fuse. Drop a dime in the cigar lighter...blow the fuse and no communication occurs.

Posted on Nov 13, 2009

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The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

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Since you are reading the computer it should be an auto reset fuse if any.
Plug the unit in then turn the ignition to the on position.
Unit should come on.
Press read
Read the codes, write them down.
Clear the codes.
Go home put the codes in google and you will see the results.

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1 Answer

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