wopony12 Posted June 22, 2016 Report Share Posted June 22, 2016 I have a code 53 which is for mixture control solenoid. To check for 12 volts to solenoid, do you check each wire individually for 12 volts since ECM is neg. source or do you check across both wires. Car does run fine. Thanks-Gary Link to comment Share on other sites More sharing options...
silverstude Posted June 24, 2016 Report Share Posted June 24, 2016 On my search, 87 GM OBD code 53, shows bad system voltage ( Voltage regulator) or EGR valve issue Link to comment Share on other sites More sharing options...
wopony12 Posted June 24, 2016 Author Report Share Posted June 24, 2016 Thank you. Will check there. Link to comment Share on other sites More sharing options...
wopony12 Posted June 24, 2016 Author Report Share Posted June 24, 2016 Sorry, I just realized I typed 53 when code was 23. Link to comment Share on other sites More sharing options...
silverstude Posted June 24, 2016 Report Share Posted June 24, 2016 (edited) Okay!... 23 - intake air temp sensor out of range, low Edited June 24, 2016 by silverstude Link to comment Share on other sites More sharing options...
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