DTC Troubleshooting: P2A00 (61)

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

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

1. Start the engine. Hold the engine speed at 3,000 rpm (min −1 ) without load (in Park or neutral) until the radiator fan comes on, then let it idle.

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

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

Does the screen indicate FAILED?

YES | - | Go to Step 6 .
NO | - | If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep the driving condition continually until a result comes on. If the screen indicates OUT OF CONDITION, go to Step 3 and recheck.

1. Turn the ignition switch OFF.

1. Replace the A/F sensor (Sensor 1).

1. Turn the ignition switch ON (II).

1. Reset the ECM/PCM with the HDS.

1. Do the ECM/PCM idle learn procedure.

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

1. 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's troubleshooting.
NO | - | Go to Step 13 .

1. 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 the driving condition continuity until a result comes on. If the screen indicates OUT OF CONDITION, go to Step 10 and recheck.