P2597Turbocharger Speed Sensor B Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2597 records short interruptions or jumps in the signal of the second turbocharger speed sensor, between which the circuit works normally. Such faults usually sit in a connector, a wire that breaks contact under engine movement or heat soak, or a sensor that drops out when hot. No manufacturer documents P2597 publicly. As an analogy, Bentley's W12 bulletin for the same sensor stresses reproducing the customer's driving situation - load, gradient, speed, light and hard acceleration - before deciding on a repair, which is exactly what a sporadic fault demands. CARB requires electronic boost-control components to be monitored. Continuous electrical faults on sensor B are P2593, P2595 and P2596; P2582 is the same pattern on sensor A.
- What you may notice
- Occasional warning lamp, sometimes only after long drives
- Short power dips under load
- Dropouts in the speed trace of the second turbo
- Likely causes
- LikelyLoose terminal or poor pin contact at sensor B
- PossibleWire breaking contact under engine movement or heat soak
- PossibleSpeed sensor B dropping out when hot
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.