P27B3Internal Control Module Transmission Gear Select Performance
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P27B3 is the monitoring code for the path that turns a chosen gear into actuator commands. In Ford's wording it supervises the actuator manager. In the 2020–2023 summary it is non-MIL on park-by-wire vehicles; the 2024 edition links it to the selectable one-way clutch (SOWC) of the eight- and ten-speed automatics, with UDS P0701_9A for an electrical SOWC fault and P0701_94 for a failed shut-off path or an unintended application, both non-MIL and detected within one second. In Ford's TR9070 dual-clutch table, P27B3 additionally covers a fault in safety-relevant CAN transmit signals. No other manufacturer documents P27B3 publicly. The trigger can be software, a wiring problem at the SOWC actuator or the actuator itself.
- What you may notice
- Wrench light or transmission message
- Certain gears or engine braking functions blocked
- Likely causes
- PossibleSupervision software or calibration
- PossibleElectrical fault at the selectable one-way clutch actuator (Ford 8/10-speed)
- RareSafety-relevant CAN transmit signal faulty (Ford TR9070)
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €0 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.