Problem: The vehicle would not pass a state
Details: The reason the vehicle would not pass
the smog inspection was because the oxygen sensor monitor would
not run. There were no diagnostic trouble codes (DTCs). The
technician found an OEM-specific drive cycle in ALLDATA Repair.
After completing the drive cycle twice, the oxygen sensor monitor
still would not run.
Later, a phone call from the customer shed some light on a
possible cause. He had replaced the oxygen sensors before the
smog inspection with some that he had bought online.
Confirmed Repair: The tech installed new
factory oxygen sensors and performed another drive cycle. The
oxygen sensor monitor ran as designed and the vehicle passed the