PCV Regulator Valve Performance
The crankcase ventilation regulator valve - which throttles blow-by gas flow toward the intake based on engine load - is electrically intact but does not deliver the modelled pressure regulation. Either the valve diaphragm is fatigued or the spring is weak.
Affected components
- Pcv regulator valve
Common causes
- High likelihood: Diaphragm fatigued
- Medium likelihood: Regulator spring weak
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.