P2588 code meaning
Turbocharger Boost Control Position Sensor B Circuit Low
Powertrain system Generic code P25xx codes Check engine light
What P2588 means
P2588 is stored when the voltage from position sensor B of the second boost actuator drops below the lowest value a working sensor can deliver - most often a grounded signal line or a missing 5 V reference. No manufacturer documents P2588 publicly; the thresholds known for sensor A give the order of magnitude. Ford's 2023 diesel OBD summary flags P2564 below 0.15 V, and GM's 2009 Duramax table uses 0.277 V for 1 s once the engine has run 3 s. A shorted reference may also upset other sensors on the same supply. P2589 is the high-side fault, P2587 a position error with a usable signal, and P2564 the same low fault on sensor A. Power is normally reduced.
P2588 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2588
- Malfunction indicator lamp on
- Power reduced, boost held low
- Further sensor codes if a shared reference is shorted
Common causes of P2588
- Most likelySignal wire of position sensor B shorted to ground
- PossibleLost or shorted 5 V reference supply
- PossibleFailed position sensor B in actuator B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbo actuator position sensor bSensor wiring
What each part of P2588 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. |
| 88 | The exact fault in that area. |
What to do next
- Note P2588 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 P2588
What does P2588 mean?
P2588 means "Turbocharger Boost Control Position Sensor B Circuit Low". P2588 is stored when the voltage from position sensor B of the second boost actuator drops below the lowest value a working sensor can deliver - most often a grounded signal line or a missing 5 V reference. It is a generic code, so it means the same on every make.
Is it safe to drive with P2588?
Drive gently and only to a workshop. With P2588 the car can go into limp mode (reduced power) to protect itself.
Will P2588 fail an emissions test?
Yes, it can. P2588 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 P2588 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2588 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.