Question about 2001 Chevrolet Cavalier

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2001 cavalier codes

Codes u1000, u1040,p0304,p0621.
the transmission won,t shift into overdrive unless you let off on the gas. also revs higher then usual and engine light and traction control light come on. can you help me with a starting point please

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  • lorrieann_br Jan 10, 2009

    2001 cavalier 2.4 liter had to replace wiring harness and computer . engine light and security light on, car will start but wont stay running hooked up scanner but cant retrieve codes scanner says link error and no codes present what is wrong

  • jess Jun 13, 2013

    did it start knocking and did it shut off

  • Anonymous Mar 31, 2014

    transmission is not shifting properly

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A light comes on in my car, it looks like a low water light, what is it?

Posted on Jan 12, 2009

  • teeky Jan 12, 2009

    I have a light that comes on in my car, it looks like a low water light, what dose it mean?

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P0621 - indicates a failure in the alternator lamp curcuit.
P0304 - indicates a miss fire was detected in the #4 cylinder
U1040 - indicates a loss of communication with the ABS system
U1000 - Indicates a class 2 communication loss

None of those codes are relating to a transmission failure (P0700-P0702)

I would have a visual look at the transmission and verify that all electrical wires are connected and tight. Then I would have the transmission serviced if it hasn't been within the last 35,000 miles.

Have the trouble codes cleared and address the ones that return.

After that you may be looking at an internal transmission adjustment and/or repair.

Good luck.

Posted on Nov 24, 2008

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