P2A00

DTC P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2003 AT-PZEV (SULEV) and 2004-2005 models)

NOTE: Information marked with an asterisk (*) applies to 2003 ULEV model.

1. Reset the ECM with the HDS.
2. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on.
3. Test-drive in D position (M/T in 3rd gear). Starting at 1,600 rpm, accelerate using wide open throttle for at least 5 seconds. Then decelerate for at least 5 seconds with the throttle completely closed until the readiness code or Temporary DTC P2A00 comes on.
4. Check for Temporary DTCs or DTCs with the HDS.

Is Temporary DTC P2A00 (P1164)* indicated?

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

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor relay, at the A/F sensor (Sensor 1), and at the ECM.