Monitored & Set Conditions
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Dodge Grand Caravan, 2002 Dodge Caravan, 2002 Chrysler Voyager, 2002 Chrysler Town & Country, and 2001 Dodge Grand Caravan. However, it is still accessible from the selected car via links, so may be relevant.
1/1 Heated Oxygen Sensor (HO2S) heater operation is monitored after ignition is turned off and engine cools down. DTC will be stored in Powertrain Control Module (PCM) if no upstream oxygen sensor signal is received when PCM powers up oxygen sensor heater. Possible causes are: intermittent condition, defective 1/1 HO2S, defective Auto Shutdown (ASD) relay circuit, or defective connectors or wiring.