P2526Vacuum Reservoir Pressure Sensor Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2526 marks a vacuum reservoir pressure reading that stays inside the electrical range but does not fit the situation, for instance no rise in vacuum after the pump has run, or a value frozen while actuators draw on the reservoir. Because the sensor watches a real system, genuine vacuum faults such as a leaking hose, a worn pump or a cracked reservoir can set it as well as a drifting sensor. Two makers name it. FCA lists P2526 among the codes the revised engine software may newly log after emissions recall T21 on the 2004–2006 Dodge Sprinter. Hino's 2019 bulletin SB-19-013 for J05E cab-over trucks has technicians clear P2526 first before working through exhaust brake fault P0027, which uses vacuum-driven valves. Thresholds stay unpublished. Electrical faults are P2527–P2529.
- What you may notice
- Check engine light, often with boost or EGR codes
- Weak exhaust brake or reduced power
- Hissing noise from a leaking line
- Likely causes
- LikelyLeaking vacuum hose, check valve or reservoir
- PossibleMechanical or electric vacuum pump delivering too little
- PossiblePressure sensor drifting or stuck
- 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: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.