| Re: Code 43 - Electronic Spark Control |
Subject: Re: Code 43 - Electronic Spark Control by toptechx6 on 2012/10/4 11:59:31 If you check the diagnostic tree in the book you will see the code does not indicate the sensor is sensing knock rather it means the ECM detects improper voltage on the circuit. That said I will relate my experience with the same code, on a 93. On my car the code normally set shortly after a cold start, bear in mind I am in Florida so we are probably talking about nothing colder than 60*. I ran the diagnostics in the FSM using a DVOM, 5 volt supply to both sensors checked good, resistance of both sensors was within specs but each was different,I don't recall the exact values. I also checked the wiring from the sensors to the ECM, all seemed fine but since it was intermittent I figured a bad connection was the most likely culprit so I replaced both knock sensor connectors without success. Finally got annoyed and replaced both sensors, the code has not returned, just my experience, your mileage may vary, good luck. |
