OBD-II code · Powertrain (generic, extended)
P2595 Turbocharger Speed Sensor B Circuit Low
Turbo speed sensor B signal voltage below the lower limit — short to ground or open supply. 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 P2595?
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
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
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 Speed Sensor B, Sensor Wiring
Related codes
- P2593Turbocharger Speed Sensor B Circuit
- P2592Cruise Control Front Distance Range Sensor Right
- P2594Turbocharger Speed Sensor B Circuit Range/Performance
- P2596Turbocharger Speed Sensor B Circuit High
- P2597Turbocharger Speed Sensor B Circuit Intermittent
- P2598Turbocharger Boost Control Position Sensor A Performance - Stuck Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.