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2000 Chevy K2500 engine light... Error code P1345 ??? What does it mean?

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  • 2000 Chevy K2500 engine light... Error code P1345 ??? What does it mean?

    My brother has a '00 Chevy K2500 pickup Bi-Fuel 4X4 and this weekend he replaced the plugs and wires (his wires were really bad and he was starting to have some backfiring). Well, some of the plugs were kind of hard to get at, and evidently he ended up having to disconnect some of the CNG components to get at everything, not to mention climbing around in there bumping stuff. Well, when he got it all back together it ran beautifully. But now engine light is always on. I have a simple code reader, and it always shows the code P1345 and P1345 pd. If I erase them, they re-appear on start-up. My manual doesn't show interpretations for codes that high, so I'm not able to interpret the code.

    My bother called me today and said that he went to his mechanic friend (knows nothing about CNG), and the the mechanic said that he felt the code was related to distributor alignment??? Anyway, the mechanic looked it over and said that he could find nothing wrong on anything he recognized, but that he felt the problem must be to a communication problem between the CNG components (I think he was suspicious of the LPR because of the wiring connections).

    So my question is, has anybody ever experienced this? My brother is afraid that he may have bumped something, or loosened a connection by accident. The truck runs perfectly in CNG mode (haven't been able to try it on gas yet, as he is on a full tank, and he has his bed filled with tanks... I believe he has over 30 gge... so it will take some time to run out of gas ) Any ideas on what could cause this code? Anything we can do to narrow it down?

    Thanks for your help,

    KIRK
    Last edited by kirkbenge; 06-05-2008, 05:43 PM. Reason: spelling

  • #2
    Re: 2000 Chevy K2500 engine light... Error code P1345 ??? What does it mean?

    I bet the distributer got turned a little. You Need a scanner to know for sure.

    1. Install a scanner and look at the cam retard value with the engine at 1200 RPM in park. The factory specification is 0 degrees plus or minus 2 degrees.

    2. If not in specification, let the engine idle, turn the distributor slightly, then bring the engine over 1,200 RPM again and the value should update. Repeat this process until 0, plus or minus 2, is achieved.

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    • #3
      Re: 2000 Chevy K2500 engine light... Error code P1345 ??? What does it mean?

      Thanks for the info KarlHafen. When I mentioned this to my brother he said, "Oh, I saw that my distibutar seemed a bit askew after I changed my wires, and I thought that I must have bumped it, so I straghtened it back." He then went and turned his distributor so that it seemed slightly askew again, and after starting the car a driving a few miles the light and code went away.

      I appreciate your help. I never would have thought of checking the distributor alignment. He didn't even use a reader, as he thought he remembered the alignment, and I guess he did.


      KIRK

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