P0980Shift Solenoid C 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
- High-voltage fault in the control circuit of shift solenoid C, meaning a short to supply. GM documents it for the Allison 1000 six-speed: the 2007 table wants four consecutive power-short samples (100 ms, Type A) and skips the check in reverse trim, 5th and 6th gear; later tables (2016, 2018) look for 0.39 ohm or less to a supply over three counts within 75 ms, and from 2022 within 60 ms, MIL after one trip. Ford uses it for SSC short to power in all its listed gearboxes, with P0760 for an open. Neither GM's 6L/6T six-speeds nor Saab's documented gearboxes use P0980. The ground counterpart is P0979, the open code for the Allison is P097C.
- What you may notice
- MIL on after the first faulty trip
- Solenoid C stuck energized, wrong gear or default gear
- Harsh shifts
- Likely causes
- LikelySolenoid C control wire shorted to a supply voltage
- PossibleShorted turns in solenoid C lowering its resistance
- PossibleAdjacent pins bridged by fluid or debris in the connector
- RareFaulty driver stage in the control module
- 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 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.