P2A00

DTC P2A00: A/F Sensor (Sensor 1) Range/Performance Problem

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
4. Check the AF FB AVG in the DATA LIST with the HDS.

Is the value between 0.8 - 1.2?

YES - Go to step 5.

NO - Go to step 2 and recheck.

5. Test-drive under the following conditions.
- Engine coolant temperature more than 158 °F (70 °C)
- A/T in D position (M/T in 3rd gear)
- Vehicle speed at 26 mph (41 km/h) or more, and engine speed at 3,250 rpm or less
- Drive with the throttle fully opened for 5 seconds at an engine speed of 1,600 rpm, then slow down with the throttle completely closed.

6. Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 7.

NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates out of CONDITION, go to step 3 and recheck.

7. Turn the ignition switch OFF.
8. Replace the A/F sensor (Sensor 1).
9. Turn the ignition switch ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure.
12. Check the AFFB AVG in the DATA LIST with the HDS.

Is the value between 0.8 - 1.2?

YES - Go to step 13.

NO - Go to step 11 and recheck.

13. Test-drive under the following conditions.
- Engine coolant temperature more than 158 °F (70 °C)
- A/T in D position (M/T in 3rd gear)
- Vehicle speed at 26 mph (41 km/h) or more, and engine speed at 3,250 rpm or less
- Drive with the throttle fully opened for 5 seconds at an engine speed of 1,600 rpm, then slow down with the throttle completely closed.

14. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2A00 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting.

NO - Go to step 15.

15. Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates Out of CONDITION, go to step 11 and recheck.