OBD-II code · Powertrain (generic, extended)
P2588 Turbocharger Boost Control Position Sensor B Circuit Low
Position sensor B signal voltage below the lower limit — short to ground or open reference. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with P2588?
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
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.6–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Turbo Actuator Position Sensor B, Sensor Wiring
Related codes
- P2564Turbocharger Boost Control Position Sensor A Circuit Low
- P2586Turbocharger Boost Control Position Sensor B Circuit
- P2585Fuel Additive Control Module Warning Lamp Request
- P2587Turbocharger Boost Control Position Sensor B Circuit Range/Performance
- P2589Turbocharger Boost Control Position Sensor B Circuit High
- P258AVacuum Pump Control Circuit A/Open
- P258BVacuum Pump Control Circuit A Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.