Crankcase Pressure Sensor B Circuit Low
The ECM detects a circuit low fault on the crankcase pressure sensor b circuit. Reading cannot be used reliably for control.
Affected components
- Crankcase pressure sensor b
- Wiring harness
- Ecm
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Internal sensor short
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
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.