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GMC Master
21,873 Answers
- Posted on Jul 12, 2014
Re: Gm obd1 codes 32 and 43
Code 32 is a problem with the EGR solenoid, and code 43 may be a problem with the knock sensor. Code 43 can set when the knock sensor is functioning correctly too.
You would need to get the troubleshooting charts for the codes to determine the problems.
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