P08DCShift Solenoid K Control Circuit High
- 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 monitored control line of shift solenoid K sits closer to supply voltage than it should, for instance because it touches a powered wire or, depending on the driver design, because the coil is open. No manufacturer documents this code publicly. GM treats the solenoid A version, P0974, as open or power short and fails it after 1.2 of 1.5 seconds, but lights the MIL only after two trips. Ford's P0974 means a short to power only, because Ford reports opens separately. CARB requires this circuit check. P08DB is the low counterpart, P08DD the open-circuit code. A valve shorted to power may stay energised, giving a wrong gear or harsh engagements.
- What you may notice
- Check engine or transmission warning light on
- Wrong gear or harsh engagement
- Possible limp mode
- Likely causes
- LikelyControl wire touching a powered conductor
- PossibleOpen coil on systems that read opens as high
- RareTCM low-side driver no longer pulls the line down
- 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.