Every time the computer tells the transmission to change gears, it activates a shift solenoid by sending an electrical charge through a coil of wire that is wrapped around the solenoid mechanism. If there is an unusually high-voltage signal coming from the shift solenoid C control circuit, then a P0980 DTC will be triggered.
How Serious is the Code?
The severity of a P0980 diagnostic trouble code might not be too bad at first. However the transmission problems associated with this OBDII code will eventually escalate to the point that the transmission will not work properly.
Symptoms of a P0980 include:
- Hard shifts
- Transmission may not shift into gear
- The transmission fluid level is too low
- Transmission fluid is too dirty
- Damaged/broken wires
- Broken/corroded connectors
- Shift solenoid failure
How to Diagnose the Code?
Dirty or low transmission fluid will actually cause a P0980 OBDII trouble code, so that should be checked first. If the ATF is clean and bright, then the wiring and connectors along the transmission wiring harness should be examined. If no broken wires or corroded/broken connectors are found, then the shift solenoid C will need to be checked.
What Repairs Will Fix P0980?
- Service the transmission
- Replace or repair damage wiring/connectors
- Replace shift solenoid
- P0978 – Shift Solenoid “C” Control Circuit Range/Performance
- P0979 – Shift Solenoid “C” Control Circuit Low