GM OBD Trouble Code 43
Knock Sensor Error
The ECM receives a signal from the Knock sensor based on the amount of engine ping detected. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.
Fault Code Description
- 43 - Knock sensor error
Symptoms
- Engine ping
- Lack of power
Common Problems
- Faulty Knock sensor
- Poor connection at Knock sensor
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