DTC P1172, P1174
DTC P1172 : Rear A/F Sensor (Bank 1, Sensor 1) Circuit Out of Range High
DTC P1174 : Front A/F Sensor (Bank 2, Sensor 1) Circuit Out of Range High
NOTE:
- Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems .
- Information marked with an asterisk (*) applies to the front bank (Bank 2).
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P1172 Rear A/F Sensor (Bank 1, Sensor 1) Circuit Out of Range High | |||
| P1174 Front A/F Sensor (Bank 2, Sensor 1) Circuit Out of Range High |
DTC (PGM-FI)
- Problem verification
- 1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Start the engine.
- 4. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
- 5. Monitor the OBD STATUS for P1172 and/or P1174 * in the DTCs MENU with the HDS.
DTC Description OBD STATUS P1172 Rear A/F Sensor (Bank 1, Sensor 1) Circuit Out of Range High P1174 Front A/F Sensor (Bank 2, Sensor 1) Circuit Out of Range High Does the HDS indicate FAILED?
YES
Replace the A/F sensor (Sensor 1) .
NO
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F Sensor (Sensor 1) and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems . If the HDS indicates EXECUTING, keep driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-4 and recheck.