OBD-II code · Powertrain (generic, extended)
P2527 Vacuum Reservoir Pressure Sensor Circuit Low
Sensor signal voltage below the lower limit — usually a short to ground or open reference. The ECM disables vacuum pump control until the input recovers.
Is it safe to drive with P2527?
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 ground
- PossibleMissing 5 V reference at the sensor
- 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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.