P3283moderate severityPowertrain
HV Wiring Harness Temperature Sensor Fault
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
A temperature sensor embedded in the HV wiring harness to monitor cable temperature has malfunctioned.
Symptoms
- HV system may derate
- Cable temperature monitoring lost
- Warning message about HV system
- Potential for undetected cable overheat
- Power may be limited as precaution
Common causes
- Temperature sensor failure
- Sensor wiring break
- Connector corrosion
- Sensor shorted by moisture
- Harness damage near sensor
Diagnostic steps
- Read HV cable temperature sensor data
- Test sensor resistance
- Inspect HV harness near sensor location
- Check sensor connector for moisture
- Compare with adjacent temperature readings
Repair notes
Replace HV cable temperature sensor. Inspect HV harness for any heat damage in the sensor area.
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