Code Enable Criteria

WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport, 2002 Isuzu Rodeo, 2002 Isuzu Axiom, and 2002 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.

Following conditions must be met for DTC diagnostic test to run:

No related DTCs.
Engine coolant temperature is 140°F (60°C) or more.
Engine run time is 5 seconds or more.
HO2S heater is operating properly.
Vehicle is operating in closed loop mode.
Bank 1 HO2S No. 2 signal voltage remains between 426 and 474 millivolts for a total of 106 seconds over a 125-second period.