Note. Freeze frame data will not be stored in the ECM for the knock sensor. The MIL will not light for a knock sensor malfunction.
Note. DO NOT perform these tests unless directed here from SELF-DIAGNOSTICS - INTRODUCTION article. Perform DTC confirmation test first.
Note. Manufacturer's Consult II diagnostic tool will display all DTCs and "first trip DTCs". Generic scan tools will display P0xxx DTCs and may display all, some or none of first trip DTCs. If fault verification or repair verification procedure relies on checking for first trip DTC and scan tool does not have this function, run the procedure twice and check for DTCs. DTCs using two-trip fault detection will set a first trip DTC on the first occurrence of the fault. On the second occurrence of the fault, DTC will set and MIL will illuminate.