OBD-II code · Powertrain (generic, extended)
P2596 Turbocharger Speed Sensor B Circuit High
Turbo speed sensor B signal voltage above the upper limit — short to reference voltage or open signal return.
Is it safe to drive with P2596?
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 reference voltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P2594Turbocharger Speed Sensor B Circuit Range/Performance
- P2595Turbocharger Speed Sensor B Circuit Low
- P2597Turbocharger Speed Sensor B Circuit Intermittent
- P2598Turbocharger Boost Control Position Sensor A Performance - Stuck Low
- P2599Turbocharger Boost Control Position Sensor A Performance - Stuck High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.