H71 - Test Drive While Monitoring HO2S PID

NOTE: This test step requires an observer to monitor PID for proper operation.

- Scan Tool still attached.

- Access HO2S PID.

- While observer views PID, test drive vehicle under different road conditions in an attempt to simulate the original fault.

- Does HO2S appear to switch properly?

YES -- UNABLE to duplicate fault. CLEAR any codes. Testing complete at this time.

NO -- REPLACE HO2S. Complete PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes