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P1635 code - Chevrolet Cars & Trucks

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GM Elec
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SOURCE: code p1635

The P01535 refers to the 5 volt reference circuit generated by the PCM. The reference voltage is being pulled low for some reason.
If there are no other codes present, the code is indicating the PCM 5 volt output is too low caused by an internal PCM failure.
If you have a volt meter, check the voltage at the TPS ( gray wire and key in run position ) and see what the actual voltage is.
Let me know and we can go from there.
Regards,

Posted on Apr 23, 2009

perkins48
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SOURCE: hi my car oldsmobile cutlas 1997 light engine on codes PO108,PO118 and sometimes P1635

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c15280269010 Here is a link to the codes and the reasons.

Posted on Aug 08, 2012

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Code p1635


The P01535 refers to the 5 volt reference circuit generated by the PCM. The reference voltage is being pulled low for some reason.
If there are no other codes present, the code is indicating the PCM 5 volt output is too low caused by an internal PCM failure.
If you have a volt meter, check the voltage at the TPS ( gray wire and key in run position ) and see what the actual voltage is.
Let me know and we can go from there.
Regards,

Apr 23, 2009 | 2000 Pontiac Grand Prix

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