What Does P0765 Mean?
Shift Solenoid C is performing outside its expected parameters or is stuck in the off position. The TCM commands solenoid C but the expected gear engagement does not occur. This typically results in the transmission failing to shift into a specific gear or experiencing significant slip during the shift event controlled by solenoid C.
Common Causes
35%
Shift solenoid C stuck closed from contamination, varnish, or internal failure
25%
Valve body bore wear preventing solenoid C from moving the shift valve
20%
Contaminated transmission fluid blocking solenoid fluid passages
15%
Internal clutch pack wear in the gear circuit controlled by solenoid C
5%
Wiring resistance preventing full solenoid actuation
Diagnostic Steps
1
Monitor commanded vs. actual gear ratio in live data to verify solenoid C is not producing the expected shift.
2
Check transmission fluid level and condition; low or contaminated fluid impairs solenoid function.
3
Measure solenoid C resistance at the transmission connector and compare to manufacturer specification.
4
Use a bi-directional scan tool to command solenoid C on/off and verify operation.
5
Drop the transmission pan and inspect for clutch debris; excessive material indicates internal wear beyond the solenoid.
6
If solenoid tests fail, replace solenoid C along with the filter and fluid.
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
Shift Solenoid C is performing outside its expected parameters or is stuck in the off position. The TCM commands solenoid C but the expected gear engagement does not occur. This typically results in the transmission failing to shift into a specific gear or experiencing significant slip during the sh...
The most common cause of P0765 (Shift Solenoid C Performance or Stuck Off) is: Shift solenoid C stuck closed from contamination, varnish, or internal failure
Typical repair costs for P0765 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle may be unable to engage a specific gear, limiting driving speed and capability. Low-speed driving is possible, but avoid highway driving until the transmission is repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0765 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
