DTC P2A00

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

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Enter the maintenance mode, then start the engine .

   -5. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.

   -6. under these conditions:

   • Engine coolant temperature (ECT SENSOR 1) above 158 deg.F (70 deg.C)
   • Transmission in D
   • Vehicle speed between 25 - 55 mph (40 - 90 km/h) for 5 minutes
   • Drive at a steady speed between 55 - 75 mph (90 - 120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for 4 seconds or more

   Signal	Current conditions
   	Values	Unit
   ECT Sensor 1
   Engine Speed

   Data List

   -7. Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS.

   DTC Description	OBD Status
   P2A00 A/F Sensor (Sensor 1) Circuit Range/Performance Problem

   OBD Status

   Does the HDS indicate FAILED?

   YES 

   The failure is duplicated. Replace the A/F sensor (Sensor 1) .

   NO 

   If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot . If the HDS indicates EXECUTING, keep driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-5 and recheck.