Question about 2002 Chevrolet Impala

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I have a 2001 Chevrolet Impala with about 94,000 miles on it. I took it to a parts store to run a diagnostic after noticing the "Check Engine" light on. The code it threw was a p1810 - TFP VALVE POSITION SWITCH ASSEMBLY code...what needs replaced? I've search everywhere online and can't seem to find a straight answer.

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  • Chevrolet Master
  • 1,250 Answers

With a scan tools look for data of transmission.
then look for A,B,C,D switch data and compare with chart
these valve are there to confirm oil pressure has been going to the right component.
see witch one of a b c d switch malfunction and have a test to wire from transmission to pcm
signal to pcm it's only a logic pattern on and off state
on is grounded
off is not grounded then if wire is ground then it send a message of malfunctionning switch or oil pressure inside transmission but do the outside diagnosis before
hope it helps

Posted on Oct 15, 2013

Testimonial: "How much will this cost to do all the testing, Denis?"

  • 2 more comments 
  • Eva Michalski
    Eva Michalski Oct 15, 2013

    How much will this cost to do all the testing, Denis?

  • Denis Houle
    Denis Houle Oct 16, 2013

    I suggest see a GM dealer for good technician

  • Denis Houle
    Denis Houle Oct 16, 2013

    if the problems is outside of transmission 1 hour or 2 at door rate. you ask at dealer a diagnosis and if there is bulletin for P1810

  • Eva Michalski
    Eva Michalski Oct 16, 2013

    Thank you Denis!

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