Code 32, and now code 43 (Knock Sensor). Help needed
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Joined: Nov 2000
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From: Detroit Area
Code 32, and now code 43 (Knock Sensor). Help needed
I replaced both oxygen sensors last summer, and the engine ran great. Then over the winter, the engine started to run like the mixture was too rich. After a few minutes of that, the Service Engine Soon light would come on, the fan would start, and a code 32 would be set. During the time the light was on, the engine would idle fast, but smooth. I replaced the EGR Control Solenoid, and now the engine runs very rough. It is hard to keep it running. There is now a code 43 (Knock Sensor). I used the GM Service Manual, to step thru the knock trouble shooting, and found no problems. The voltage on both knock sensors’ wires was 4.9 volts. The resistance on both sensors was 3,500 ohms. The manual said if the voltage and resistance was ok, then the problem could be the PCM or the Knock Module. I could not find any Knock Module in the book. Does anyone have any suggestions?
