Vacuum Reservoir Pressure Sensor Circuit
General electrical fault on the vacuum reservoir pressure sensor circuit. The reservoir stores manifold or pump-generated vacuum for systems like brake booster, EGR actuators or HVAC dampers. Without a valid reading the ECM disables vacuum-pump duty cycle control.
Affected components
- Vacuum reservoir pressure sensor
- Sensor wiring
Common causes
- High likelihood: Open or shorted wiring to the sensor
- Medium likelihood: Failed sensor element
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.