Conditions For Running DTC

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The ignition 1 signal is more than 10 volts.
The Engine Coolant Temperature (ECT) is more than 113°F (45°C).
The Intake Air Temperature (IAT) is less than 113°F (45°C).
The difference between the ECT and the IAT is less than 45°F (7°C).
The fuel level is more than 10 percent.
The rear HO2S voltage is 395-495 millivolts.