H56 - Check For DTCs 1132 and 1152 With 1130 and 1150

- Key Off.

- Scan Tool connected.

- Activate Key On Engine Running (KOER) Self-Test.

- Is DTCs 1132 or 1152 present?

YES -- Go to H57. H57 - Check For HO2S Signal Shorted to Power

NO -- The fault that produced the DTC is an intermittent. GO to Pinpoint Test Step Z1 with the following data: HO2S-11, 21, 12, 22 PIDs and list of possible causes. Z1 - Intermittent Test Procedure