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2001 Chevrolet Silverado 1500 Question: CHECK ENGINE LIGHT IS ON

 

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Kezorm, 4.8L V8, Bossier City, LA, March 10, 2010, 08:34
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I HAVE 01 CHEVY PICKUP 1500 SILVERADO 2 WHEEL DRIVE 4.8L ENGINE. HAD CODES CHECKED AT PARTS STORE PO327&PO332 WHAT DO I HAVE TO DO TO REPAIR THIS PROBLEM. THEY SAID THEY WERE SENSORS.IF I REPLACE THEM WILL IT FIX MY PROBLEM?ALSO WERE ARE THEY LOCATED? THANKS FOR ANY HELP ON THIS.

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  • Answer #1

    Honest1autocare (see my shops), March 10, 2010, 10:45
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     Journeyman

    Here is the test for p0332.
    1. Disconnect the knock sensor pigtail harness on the back of the intake and check for 100K ohms resistance to ground on both sensors.

    2. Switch the meter to AC volts and check for several tenths of a volt output from the knock sensor when disconnected and connected to the harness.

    3. If the voltage stays the same, install a scan tool and check for any knock indications.

    4. If the voltage output is reduced when connected, check for a wiring problem

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