H20 - DTCs 0133 and 0153: HO2S Response Test

DTCs 0133 and 0153 indicate the response rate of the HO2S is below some calibrated window.

Fault Code/HO2S reference chart:
DTC 0133 = HO2S-11
DTC 0153 = HO2S-21

Possible Causes:
- Contaminated HO2S.
- Exhaust leaks.
- Shorted/open wires.
- Excessive fueling.
- MAF meter.
- Air leaks.

- Key Off.

- Scan Tool connected.

- Key On, Engine Off.

- Access Generic On-Board Diagnostics II (OBD II) functions and trigger.

- Scroll to Oxygen Sensor Test and trigger.

- Scroll to Manufacturer Specific Test ID and trigger.

- Scroll to Test ID: (41H) and trigger.

- Is the measurement for the HO2S fault greater than 0.6 volts?

YES -- COMPLETE PCM reset to clear DTCs. COMPLETE a HO2S monitor drive cycle. REPEAT Test Step H20. If test results are greater than 0.6 volts, testing is complete.

NO -- Oxygen Sensor test results are out of an acceptable range. Go to H21. H21 - Check For Source of Potential HO2S Contamination