Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 96
Possible causes
- Signal wire shorted to reference voltage high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1000 €
- Estimated time: 0.6–2.5 h
- Component: turbo speed sensor b
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012