P0145

DTC P0145: Slow Response in Third HO2S (Sensor 3) Circuit

(ULEV model)

1. Reset the ECM with the HDS.
2. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on.
3. Test/drive under these conditions:

- 55 - 65 mph (89 - 105 km/h) steady speed
- CVT in D position (M/T in 4th or 5th gear)
- Until the readiness code or Temporary DTC P0145 and/or P0145 is set

4. Check for a Temporary DTCs or DTCs with the HDS.

Is Temporary DTC P0145 and/or P0145 indicated?

YES - Replace the secondary HO2S (Sensor 2) and the third HO2S (Sensor 3).

NO - Go to step 5.

5. Test-drive the vehicle at a steady 50 mph (80 km/h). During the drive, decelerate with the throttle fully closed for 5 seconds.
6. Check the HO2S S3 in the DATA LIST with the HDS.

Does the voltage stay at 0.3 V or less?

YES - Go to step 7.

NO - Replace the secondary HO2S (Sensor 2) and the third HO2S (Sensor 3).

7. Test-drive the vehicle from 0 mph (0 km/h) to 50 mph (80 km/h) with wide open throttle for 5 seconds.
8. Check the HO2S S3 in the DATA LIST with the HDS.

Does the voltage stay at 0.6 V or more?

YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the third HO2S (Sensor 3) and at the ECM.

NO - Replace the secondary HO2S (Sensor 2) and the third HO2S (Sensor 3).