P2597 code meaning
Turbocharger Speed Sensor B Circuit Intermittent
Powertrain system Generic code P25xx codes Check engine light
What P2597 means
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.
P2597 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2597
- Occasional warning lamp, sometimes only after long drives
- Short power dips under load
- Dropouts in the speed trace of the second turbo
Common causes of P2597
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbo speed sensor bSensor wiring
What each part of P2597 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 97 | The exact fault in that area. |
What to do next
- Note P2597 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2597
What does P2597 mean?
P2597 means "Turbocharger Speed Sensor B Circuit Intermittent". P2597 records short interruptions or jumps in the signal of the second turbocharger speed sensor, between which the circuit works normally. It is a generic code, so it means the same on every make.
Is it safe to drive with P2597?
Drive gently and only to a workshop. With P2597 the car can go into limp mode (reduced power) to protect itself.
Will P2597 fail an emissions test?
Yes, it can. P2597 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2597 to fix?
Difficulty: hard. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P2597 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.