OBD-II trouble code
P0762: Shift Solenoid "C" Stuck On
Shift solenoid C is stuck in its "on" state — hydraulically jammed or electrically held — so the transmission applies an element it shouldn't and ends up stuck in the wrong gears or shifting harshly. It's the opposite of P0761 (stuck off), and it's usually a mechanical stick from contaminated fluid rather than a wiring fault.
Quick facts
- System
- Powertrain
- Category
- Transmission / Shift Control
- Severity
- High severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $150 – $900
- DIY difficulty
- Advanced DIY
What does P0762 mean?
Automatic transmissions shift by routing pressurized fluid through solenoid-controlled valves. Shift solenoid C, along with A and B, opens and closes in patterns that command specific gears. P0762 sets when the TCM sees the mechanical result of solenoid C being stuck on: it commands the solenoid off, but gear ratios and pressures say the element is still applied. Contrast this with P0760 (general malfunction) and P0763 (electrical) — P0762 is usually a hydraulic or mechanical stick, not a wiring problem. It's also the mirror image of P0761: instead of the solenoid failing to apply pressure, it's failing to release it. Because the A/B/C labeling varies by transmission, confirm which physical solenoid 'C' is on your unit before testing.
The classic root cause is contamination. Worn, burned, or debris-laden transmission fluid gums the solenoid's small valve or the valve-body passage it lives in, holding it open even after the TCM cuts the command. An internally failed solenoid that won't return, or a valve-body problem where a spool valve sticks, are next in line. Because the transmission is now applying the wrong element for the commanded gear, the TCM typically forces limp mode — often locking the transmission in a single gear — to prevent the clutch tie-up and heat that a stuck-on solenoid can cause.
Fluid first: on a transmission with old fluid, a proper fluid and filter service, sometimes with a cleaning additive, occasionally frees a sticking solenoid because the underlying cause is varnish rather than a dead part. If the code returns after fresh fluid, the solenoid or valve body needs work. For the driver, P0762 shows up as firm or slamming shifts, being stuck in a gear, slipping or tie-up as two elements fight, and a check engine light with limp mode. The car usually still moves but shifts badly, and prolonged driving in the wrong gear adds heat and stress.
Common causes
- Sticking solenoid valve due to contaminated, burned, or degraded fluid
- Failed shift solenoid C that stays mechanically applied
- Debris in the valve body passages holding the valve open
- Valve body wear or a stuck shift valve
- Clogged transmission filter and low line pressure aggravating the stick
- Internal transmission damage producing false ratio readings (less common)
Symptoms
- Check engine light on, transmission in limp / failsafe mode
- Stuck in one gear or missing specific gears
- Harsh, firm, or slamming shifts
- Slipping or clutch tie-up as the wrong element stays applied
- Engine lugging or revving wrong for road speed
- Reduced fuel economy
Diagnostic steps
- 1.Check fluid level, color, and smell first — dark, burnt, or debris-laden fluid reframes the whole diagnosis.
- 2.Confirm in service data which physical solenoid 'C' is on your transmission before testing.
- 3.Scan TCM data: compare commanded vs. actual gear and solenoid C state to confirm the stuck-on behavior.
- 4.Service the fluid and filter if degraded, clear the code, and retest — a sticking solenoid sometimes frees up.
- 5.Inspect the valve body for debris and a sticking spool valve if the code returns.
- 6.Replace solenoid C (often part of a pack) or repair the valve body, then road-test through all gears.
Repair cost
$150 – $900
A fluid and filter service ($150-$300) is the mandatory first step and an occasional cure. Solenoid replacement typically runs $300-$600 where the pan gives access; valve-body-out jobs and solenoid packs push toward $900+. Internal repairs beyond that are transmission-shop territory. Diagnosing hydraulic vs. electrical before buying parts avoids replacing a good solenoid.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with transmission shift solenoid replacement preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
This is an advanced DIY job. It typically requires specialty tools, scan-tool access, lifting equipment, or careful sequencing to avoid causing new failures. Plan for extended downtime and have a backup vehicle. Most owners are better served by a shop that has done this repair before.