Code Enable Criteria
PCM will run diagnostic for this DTC under the following conditions:
- No TP, MAF, ECT, CKP, CMP sensor or VSS DTCs are set.
- Engine speed is 1000-5000 RPM.
- Engine has been running for a minimum of 30 seconds.
- Throttle angle is more than 15 percent.
- Engine load is more than 40 percent.
- Engine coolant temperature is more than 153°F (60°C).
- Maximum spark retard is less than 15 degrees.
- System voltage is more than 9 volts.
- Engine run time is more than 20 seconds.
DTC will set when PCM detects a malfunction in integrated knock sensor diagnostic circuitry which will not allow proper diagnosis of knock sensor circuits. Conditions must be present for at least 30 seconds.