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2002 GMC Yukon Check Engine Light Keeps Coming On.

Tiny
CALDFAM2
  • MEMBER
  • 2002 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 93,325 MILES
On my Yukon, my check engine light comes on constantly. Sometimes it will reset itself, but then it will come on again in a few hours or a few days. The code I get from the light is PO332 and it says that it's the knock sensor, I have replaced BOTH knock sensors as well as the wiring harness for the sensors and I'm still getting the check engine light withe the code of PO332. What else could cause this problem and how can I fix it?
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Monday, June 8th, 2009 AT 11:19 AM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, when you replaced the old sensors, did you see rust or moisture in the sensor well? There is bulletin about that code, moisture intrusion, water gets in the sensor well. The cure is to build a wall of rtv sealant around the sensor/s.

Might not be your problem, just a thought. I don't have the wiring info in front of me for the sensor/s.
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Monday, June 8th, 2009 AT 11:48 AM

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