OBD-II code · Powertrain (generic, extended)
P2526 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.
Is it safe to drive with P2526?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLeaking reservoir or vacuum line
- PossibleAged sensor with offset drift
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Vacuum Reservoir, Vacuum Lines, Vacuum Pump
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.