P2B94 code meaning
Wastegate Position Sensor B Exceeded Learning Limit
Powertrain system Generic code P2Bxx codes Check engine light
What P2B94 means
P2B94 is set when the learned end position of electric wastegate B falls outside the window the engine computer accepts. Stellantis documents it on the 2025 Ram 1500 with the 3.0L Hurricane twin-turbo: bulletin 09-008-25 (Rev. B) lists P2B94 together with P0248 and a MIL, with weak turbo response, caused by wastegate rod retention clips installed incorrectly at the factory. The fix is to measure the clips with a caliper and replace any that exceed 13.70 mm on the actuator side or 17.78 mm on the housing side. Ford's patent US9243553B2 explains the principle behind the learn step: the controller moves the valve against a mechanical stop and stores the sensor value there, so play in the linkage moves the learned point. Side A uses P2B93.
P2B94 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.3 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2B94
- MIL on, often together with P0248
- Lack of acceleration from the turbo
Common causes of P2B94
- Most likelyWastegate rod retention clips incorrectly installed (Stellantis 09-008-25)
- PossiblePlay or bending in the wastegate B linkage
- Less likelyCharger or actuator B replaced without completed relearn
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Wastegate position sensor bWastegate actuatorECM
What each part of P2B94 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. |
| 94 | The exact fault in that area. |
What to do next
- Note P2B94 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 P2B94
What does P2B94 mean?
P2B94 means "Wastegate Position Sensor B Exceeded Learning Limit". P2B94 is set when the learned end position of electric wastegate B falls outside the window the engine computer accepts. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B94?
Drive gently and only to a workshop. With P2B94 the car can go into limp mode (reduced power) to protect itself.
Will P2B94 fail an emissions test?
Yes, it can. P2B94 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 P2B94 to fix?
Difficulty: medium. A typical repair takes 0.3 to 5 hours of work. This is a job for a workshop.
Will P2B94 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.