Vacuum Reservoir Pressure Sensor Circuit Range/Performance
The vacuum reservoir pressure sensor is electrically intact, but the reading does not match the model — vacuum that does not build up after pump activation, does not bleed off when consumers draw, or stays at one value. Often a partly clogged hose, a leaking reservoir or an aged sensor.
Affected components
- Vacuum reservoir
- Vacuum lines
- Vacuum pump
Common causes
- High likelihood: Leaking reservoir or vacuum line
- Medium likelihood: Aged sensor with offset drift
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
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.