P08DBShift Solenoid K Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The TCM's output stage reports a voltage on the shift solenoid K control circuit below what the commanded state requires, the classic sign of a control wire rubbing through to ground or a coil with an internal short. No manufacturer documents this K code publicly. For solenoid A, GM's 6-speed tables set P0973 when a ground short is flagged for 1.2 out of 1.5 seconds, with at least 9 V supply and the engine running, and light the MIL after one trip; Ford lists P0973 as short to ground. CARB mandates the check. P08DC is the opposite fault and P08DD the open circuit. Many TCMs then disable the valve, so expect a limp-home gear.
- What you may notice
- Check engine or transmission warning light on
- Transmission stays in a limp-home gear
- Reduced acceleration due to missing gears
- Likely causes
- LikelyControl wire rubbed through to ground
- PossibleInternally shorted solenoid coil
- RareTCM output stage fault
- 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.