DTC P2097 (2014 2015)
DTC P2097 : Post Catalyst Fuel Trim System Too Rich (Bank 1)
- If any of the DTCs listed below are stored at the same time as DTC P2097, troubleshoot those DTCs first, then recheck for P2097.
P0133, P1172, P2A00: Rear A/F sensor (Sensor 1, Bank 1)
P0134: Rear A/F sensor (Sensor 1, Bank 1) heater
P0137, P0138, P0139, P2270: Rear secondary HO2S (Sensor 2, Bank 1)
P0141: Rear secondary HO2S (Sensor 2, Bank 1) heater
P0171, P0172: Fuel system
P0201, P0202, P0203, P0204, P0205, P0206: Fuel injector
P0300: Random misfire
P0301, P0302, P0303, P0304, P0305, P0306: No. 1?No. 6 cylinder misfire
P0351, P0352, P0353, P0354, P0355, P0356: Ignition coil
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P2097 Post Catalyst Fuel Trim System Too Rich (Bank 1) |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
- 4. Test-drive the vehicle under these conditions:
- Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
- Transmission in D
- Engine speed below 4, 000 rpm
- Vehicle speed between 15-75 mph (24-120 km/h) for 3 minutes or more
Signal Current conditions Values Unit ECT SENSOR 1 ENGINE SPEED VEHICLE SPEED - 5. Monitor the OBD STATUS for DTC P2097 with the HDS.
DTC Description OBD STATUS P2097 Post Catalyst Fuel Trim System Too Rich (Bank 1) Does the HDS indicate FAILED?
YES
The failure is duplicated. Go to step 2.
NO
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rear A/F sensor (Sensor 1, Bank 1), rear secondary HO2S (Sensor 2, Bank 1), and the PCM.If the HDS indicates EXECUTING, keep the test conditions until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-4 and recheck.
- Exhaust system check
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check for leakage, clogging, or blockage in the exhaust system.
Is there leakage in the exhaust system between the rear A/F sensor (Sensor 1, Bank 1) and the rear secondary HO2S (Sensor 2, Bank 1), or any clogging or restrictions in the exhaust system?
YES
Repair or replace the exhaust system - Refer to: Warm Up TWC Removal and Installation, or Under-Floor TWC Removal and Installation .
NO
Go to step 3.
- A/F sensor (Sensor 1) check (substitution)
-1. Substitute a known-good rear A/F sensor (Sensor 1, Bank 1).
- 2. Reconnect all connectors.
- 3. Turn the vehicle to the ON mode.
- 4. Reset the DTC with the HDS.
Reset PCM
- 5. Do the PCM idle learn procedure.
- 6. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
- 7. Test-drive the vehicle under these conditions:
- Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
- Transmission in D
- Engine speed below 4, 000 rpm
- Vehicle speed between 15-75 mph (24-120 km/h) for 3 minutes or more
Signal Current conditions Values Unit ECT SENSOR 1 ENGINE SPEED VEHICLE SPEED - 8. Monitor the OBD STATUS for DTC P2097 with the HDS.
DTC Description OBD STATUS P2097 Post Catalyst Fuel Trim System Too Rich (Bank 1) Does the HDS indicate PASSED?
YES
Replace the original rear A/F sensor (Sensor 1, Bank 1) .
NO
If the HDS indicates FAILED, replace rear secondary HO2S (Sensor 2, Bank 1) , then recheck. If the HDS indicates EXECUTING, keep the test conditions until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 3-7 and recheck.