DTC P2A00, P2A03

DTC P2A00  : Rear A/F Sensor (Bank 1, Sensor 1) Circuit Range/Performance Problem DTC P2A03  : Front A/F Sensor (Bank 2, Sensor 1) Circuit Range/Performance Problem

NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the A/T System (2014 2015), or How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016) .
• Information marked with an asterisk (*) applies to the front bank (Bank 2).

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

   - 4. Test-drive under these conditions:

   • Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °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 8 seconds or more

   Signal	Current conditions
   	Values	Unit
   ECT SENSOR 1
   ENGINE SPEED

   - 5. Monitor the OBD STATUS for DTC P2A00 and/or P2A03 * in the DTCs MENU with the HDS.

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

   DTC Description	OBD Status
   P2A03 Front A/F Sensor (Bank 2, Sensor 1) Circuit Range/Performance Problem

   Does the HDS indicate FAILED?

   YES 

   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 HDS indicates EXECUTING, keep driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-3 and recheck.