What Does P0764 Mean?
Shift Solenoid C is exhibiting intermittent electrical behavior. The TCM periodically detects irregular voltage or current flow in the solenoid C circuit that disrupts normal shift operations. This can cause sporadic harsh shifts, brief shift flares, or momentary gear engagement issues that are not consistently reproducible.
Common Causes
35%
Loose or corroded connection at the transmission harness causing intermittent solenoid C contact
30%
Shift solenoid C developing an internal intermittent open or short
20%
Degraded transmission fluid causing periodic solenoid valve sticking
10%
Chafed or damaged internal transmission harness wiring
5%
Intermittent TCM driver circuit issue for solenoid C
Diagnostic Steps
1
Monitor solenoid C duty cycle and current draw in real-time while driving through the affected shift points.
2
Wiggle-test the transmission connector and harness while monitoring solenoid C data for signal dropout or fluctuation.
3
Inspect the transmission connector pins for corrosion, discoloration, or looseness.
4
Check solenoid C resistance both cold and at operating temperature to detect thermal-related intermittent failures.
5
If external wiring tests pass, inspect the internal harness and replace solenoid C if it tests intermittent.
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
Shift Solenoid C is exhibiting intermittent electrical behavior. The TCM periodically detects irregular voltage or current flow in the solenoid C circuit that disrupts normal shift operations. This can cause sporadic harsh shifts, brief shift flares, or momentary gear engagement issues that are not ...
The most common cause of P0764 (Shift Solenoid C Intermittent) is: Loose or corroded connection at the transmission harness causing intermittent solenoid C contact
Typical repair costs for P0764 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent shift issues can cause unexpected vehicle behavior. Drive cautiously and avoid heavy load situations. Have the issue diagnosed before it becomes a constant fault.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0764 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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