What it means
Shift solenoid C remains hydraulically active when commanded off — the corresponding clutch or band cannot release, locking out shifts that depend on it. The TCM detects the missing release via gear-ratio error or output-shaft slip.
At a glance
- Usually lights the check-engine light
How it works
Shift Solenoid C directs hydraulic pressure for gear changes, and its commanded-off state should allow the related hydraulic circuit to release. P0762 sets when the TCM detects that the Solenoid C circuit remains hydraulically active when release is expected, often through a gear-ratio or shaft-speed mismatch.
Common causes
Most likely first.
- Solenoid stuck open by debris
- Stuck valve spool
- Carbon or debris buildup preventing free movement
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Scan for transmission codes and freeze-frame data, and identify the gear change or operating conditions when the TCM detected Solenoid C failing to release.
- Check the fluid level and condition, looking for contamination or debris that could keep Solenoid C or its valve spool from moving freely.
- Inspect the transmission connector and wiring for damage or fluid intrusion, while recognizing that this code indicates a stuck-on response rather than necessarily an electrical fault.
- Use scan-tool commanded-state and gear-ratio or shaft-speed data during a controlled test to confirm whether the hydraulic circuit remains applied after Solenoid C is commanded off.
- Follow the manufacturer’s procedure to inspect Solenoid C and its valve-body passage for debris or sticking before considering internal clutch or band damage.
Common fixes
- Correct the fluid level and service contaminated fluid and filter as specified.
- Clean and secure the transmission connector if it is contaminated or loose.
- Remove debris or sticking material from the Solenoid C valve passage as specified.
- Replace a sticking Shift Solenoid C or valve spool.
- Repair clutch, band, or other internal damage if inspection confirms it.
Can I keep driving?
Limit driving if shifts are harsh, delayed, slipping, or the transmission cannot release a gear normally; avoid heavy loads and long trips. A clutch or band held applied can overheat and cause further transmission damage.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.