P08D4Shift Solenoid J Control 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
- Dedicated code for an open control circuit of shift solenoid J: the TCM drives the valve but no current flows through wire, connector or coil. No manufacturer documents this code publicly. The known analogues show why: Ford files an open circuit under the base code of each solenoid (P0750 for solenoid A) and GM includes it in the high-voltage code P0974, so neither needs a separate open code. Ford detects such electrical faults when driver feedback disagrees with the command for 0.5 to 5 seconds. CARB requires open and short checks on transmission outputs. P08D2 and P08D3 are the short-circuit codes. An unpowered valve rests in its default state, so a gear may be missing or locked.
- What you may notice
- Check engine or transmission warning light on
- One gear missing or transmission stuck in one gear
- Harsh shifts
- Likely causes
- LikelyBroken control wire or loose terminal
- PossibleBurnt-out solenoid coil
- PossibleTransmission connector not fully seated after service
- 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: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.