2002 Dodge Grand Caravan P0135 O2 Sensor Heater Circuit Fault: Causes and Diagnosis

Model: 2002 Dodge Grand Caravan Fault Code: P0135 Posted: 2009-08-06 17:53

Hi everyone, I recently received a P0135 diagnostic code on my 2002 Dodge Grand Caravan. This code indicates an issue with the oxygen (O2) sensor heater circuit. My brother-in-law has a OBD2 scanner, and I'm trying to understand what this means — is it indicating a faulty oxygen sensor? What are the common causes of this fault? I used to enjoy working on cars manually, but now most issues seem to stem from electronics. Any insights or troubleshooting tips would be greatly appreciated. Thanks in advance for your help! Drew