P2B93 code meaning
Wastegate Position Sensor A Exceeded Learning Limit
Powertrain system Generic code P2Bxx codes Check engine light
What P2B93 means
P2B93 concerns the learned closed position of electric wastegate A. The computer periodically drives the valve onto its seat and stores the sensor value found there; Ford's patent US9243553B2 explains why: linkage length drifts with temperature and the reference must be refreshed. GM documents the code for the 2.7L L3B (19OBDG03D) and in the 2025 table 25OBDG03B: it fails when the raw closed position learned is above 85 %, or when no valid closed position has ever been learned while the engine runs above 1000 rpm with a stable valve and coolant at least 80 degrees Celsius. It is Type A with one trip. The usual reasons are a worn seat, a bent or stretched linkage or a replaced charger not yet adapted; this differs from P2B81, which judges how the valve follows.
P2B93 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2B93
- MIL in the first trip
- Boost slightly low because the valve does not fully close
Common causes of P2B93
- Most likelyWastegate linkage bent, stretched or wrongly adjusted
- PossibleWastegate flap or seat worn so the valve travels too far
- PossibleTurbocharger or actuator replaced and relearn not completed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Wastegate position sensor aWastegate actuatorECM
What each part of P2B93 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 93 | The exact fault in that area. |
What to do next
- Note P2B93 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 P2B93
What does P2B93 mean?
P2B93 means "Wastegate Position Sensor A Exceeded Learning Limit". P2B93 concerns the learned closed position of electric wastegate A. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B93?
Drive gently and only to a workshop. With P2B93 the car can go into limp mode (reduced power) to protect itself.
Will P2B93 fail an emissions test?
Yes, it can. P2B93 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 P2B93 to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P2B93 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.