OBD-II code · Powertrain (generic, extended)
P2528 Vacuum Reservoir Pressure Sensor Circuit High
Sensor signal voltage above the upper limit — usually a short to reference voltage or open signal return. ECM disables vacuum pump control to avoid overshooting.
Is it safe to drive with P2528?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to reference voltage
- PossibleOpen signal return
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Vacuum Reservoir Pressure Sensor, Sensor Wiring
Related codes
- P2525Vacuum Reservoir Pressure Sensor Circuit
- P2526Vacuum Reservoir Pressure Sensor Circuit Range/Performance
- P2527Vacuum Reservoir Pressure Sensor Circuit Low
- P2529Vacuum Reservoir Pressure Sensor Circuit Intermittent
- P252AEngine Oil Quality Sensor Circuit
- P252BEngine Oil Quality Sensor Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.