P2A00

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

NOTE: Information marked with an asterisk (*) applies to '04 model.

1. Reset the ECM.
2. Start the engine. Hold the engine at 3,000 rpm with no load (in neutral) until the radiator fan comes on.
3. Check for a Temporary DTC with the HDS or a scan tool.

Is Temporary DTC P1164 (P2A00)* indicated?

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

NO - Go to step 4.

4. Test-drive 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 A/F sensor readiness code is set to complete or Temporary DTC P1164 (P2A00)* comes on.
5. Check for a Temporary DTC with the HDS or a scan tool.

Is Temporary DTC P1164 (P2A00)* 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.