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. Turn the ignition switch ON (II).
  1. Reset the ECM/PCM with the HDS.
  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.