DTC P2A00: A/F Sensor Circuit Slow Response (Bank 1 Sensor 1): Procedure
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2A00)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream ON.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read DTCs.RESULT
Result Proceed to P2A00 A P2A00 and other DTCs B HINT:
If any DTCs other than P2A00 are output, troubleshoot those DTCs first.
B → See step 9
A: Go to next step
- INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE). Refer to PROCEDURE - Step 1
NG → See step 10
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) See step 1
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- PERFORM CONFIRMATION DRIVING PATTERN
- Drive the vehicle according to the Confirmation Driving Pattern.
NEXT: Go to next step
- CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
- Read DTCs.RESULT
Result Proceed to P2A00 A No output B
B → See step 11
A: Go to next step
- REPLACE AIR FUEL RATIO SENSOR
- Replace the air fuel ratio sensor. Refer to REMOVAL .
NEXT: Go to next step
- PERFORM CONFIRMATION DRIVING PATTERN
- Drive the vehicle according to the Confirmation Driving Pattern.
NEXT: Go to next step
- CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
- Read DTCs.RESULT
Result Proceed to No output A P2A00 B
B → See step 12
A → END
- GO TO DIAGNOSTIC TROUBLE CODE CHART
- REPLACE AIR FUEL RATIO SENSOR. Refer to REMOVAL
- Refer to CHECK FOR INTERMITTENT PROBLEMS
- CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR-FUEL RATIO. Refer to INSPECTION PROCEDURE