P2A01

DTC P2A01

DTC Detecting Condition and Trouble Area






Wiring Diagram

Refer to P0037 DTC P0037 / P0038 / P0054.

DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

NOTE:

- If DTCs other than aimed DTC are previously detected in DTC confirmation procedure, be sure to troubleshoot DTC previously detected.
- Check that the following conditions are satisfied when using this procedure.

- ECT > 70 °C (158 °F)

1) Warm up engine to operating temperature.
2) Drive vehicle at 50 - 80 km/h (31 - 50 mile/h) for 5 min. at 5th gear or D range. (Keep throttle valve opening constantly in this step.)
3) Release accelerator pedal, and keep vehicle coasting for 10 sec. with engine braking applied. (fuel cut condition.)
4) Stop vehicle and run engine at idle speed for 5 min.
5) Check whether O2 sensor readiness/monitoring test has completed or not by using scan tool.

If O2 sensor readiness/monitoring test has not completed, check vehicle conditions (environmental) and repeat Steps 2) through 4).

DTC Troubleshooting



1.
Was "Engine and Emission Control System Check" performed?
YES
Go to Step 2.
NO
Go to Engine and Emission Control System Check.

2. DTC check

Check DTC.

Is there DTC(s) other than P2A01?
YES
Go to applicable DTC(s).
NO
Go to Step 3.

3. Exhaust system for leakage check

Check exhaust system for leakage.

Is it in good condition?
YES
Go to Step 4.
NO
Repair or replace defective parts.

4. HO2S circuit check

Check signal and ground circuits of HO2S for high resistance according to Step 3 under P0137 DTC P0137 / P0138.

Are they in good condition?
YES
Replace HO2S and recheck. If this DTC is detected again, substitute a known-good ECM.
NO
Repair or replace defective wiring harness / connector.