P0032 Jeep Grand Cherokee - O2 Sensor 1/1 Heater Circuit High | Step-by-Step Diagnosis

P0032 (O2 Sensor 1/1 Heater Circuit High) on a Jeep Grand Cherokee? This video walks through the complete 7-step factory diagnostic procedure with the wiring diagram and connector views - no guesswork, no parts cannon.

When monitored: Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is off.
Set condition: Desired state does not equal Actual state. One Trip Fault. Three good trips to turn off the MIL.

In this video:
1. Active DTC
2. O2 Heater Element
3. (K99) O2 1/1 Heater Control Circuit
4. (Z42) O2 Heater Ground Circuit Open
5. (K99) O2 1/1 Heater Control Circuit Shorted To Battery Voltage
6. (K99) O2 1/1 Heater Control Circuit Open
7. PCM

Possible causes covered: (K99) O2 1/1 Heater Control Circuit Open; (Z42) O2 1/1 Heater Ground Circuit Open; (K99) O2 1/1 Heater Control Circuit Shorted To Battery Voltage; O2 Sensor; PCM.

Applies to the Jeep Grand Cherokee third generation (WK, 2005-2010) with the 3.7L V6, 4.7L V8 and 5.7L HEMI V8 (and SRT-8 6.1L). Much of the diagnostic logic is shared with the related Jeep Commander (XK) of the same era.

This is general information for educational purposes - always confirm against the service information for your exact vehicle.

Видео P0032 Jeep Grand Cherokee - O2 Sensor 1/1 Heater Circuit High | Step-by-Step Diagnosis канала Diagnostic Trouble Codes