P2669Actuator Supply Voltage B Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Many transmission controllers feed their solenoids through internal high-side switches, called actuator supply A and B. Ford's 6R140 splits its Transmission Solenoid Power Control into two wires: TSPC-A powers shift solenoids A, C and E (fault P0657), TSPC-B powers SSB, SSD, TCC and line pressure control (P2669). Because both share one internal switch, any fault switches off all seven solenoids, leaving park, reverse, neutral and 5th gear with full line pressure; Ford lists P2669 with MIL. In GM's 16OBDG08 tables for Silverado/Sierra the TCM flags an open supply 2 when several solenoids on it read open at once while the supply line stays high; GM's 2023 TCM test checks at power-down and logs it as Type A. P2670 and P2671 cover low and high faults.
- What you may notice
- Transmission stuck in a fixed gear (failsafe)
- Harsh engagements due to maximum line pressure
- MIL or transmission warning on
- Likely causes
- LikelyOpen supply wire or connector between module and transmission bulkhead
- PossibleDamaged internal transmission harness or lead frame
- RareHigh-side switch inside the controller failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.