PCV Heater "B" Control Circuit High
The control circuit of PCV (positive crankcase ventilation) heater B reports a control circuit high condition. PCV line heater prevents oil mist freezing in cold weather.
Affected components
- Pcv heater b
- Wiring harness
- Ecm
Common causes
- High likelihood: Control wire shorted to B+
- Medium likelihood: Open heater element
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.