P2527Vacuum Reservoir Pressure Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2527 means the signal from the vacuum reservoir pressure sensor has fallen below the lowest voltage a working sensor can produce. Whether low volts stand for deep vacuum or for atmospheric pressure depends on the sensor curve, but a reading at the floor is treated as an electrical fault, not as a vacuum value. Likely causes are a signal line shorted to ground, an open line on a sensor with pull-down, a missing 5 V reference, or a dead sensor. The 2004–2006 Dodge Sprinter is the documented case: FCA's emissions recall T21 names P2527 among the codes that may appear once the corrected engine software is installed; voltage thresholds were not published. P2528 is the high-side counterpart, P2526 a plausible voltage with an implausible value. Vacuum actuators may then run open-loop.
- What you may notice
- Check engine light
- Boost or EGR control in default mode, less power
- Likely causes
- LikelySignal wire shorted to ground
- Possible5 V reference open or pulled down
- PossibleSensor without output
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.