Shift Solenoid C Performance or Stuck Off
What it means
The transmission control module (TCM) has found that operating shift solenoid C does not cause the expected change in gear ratio, so the gear that relies on this solenoid does not engage or slips. The solenoid is usually clogged or stuck, or the fluid is low, even though the wiring is fine.
Symptoms5
- A certain gear missing or a very late shift into it.
- Slipping with a sudden engine speed flare during the shift.
- Transmission entering limp mode.
- Burned fluid smell in advanced cases.
- Check engine light on.
Possible causes6
- Low or old transmission fluid.
- Shift solenoid C clogged or stuck closed.
- Clogged solenoid screen or transmission filter.
- Worn valve or bore in the valve body.
- Internal leak in the circuit of the clutch linked to solenoid C.
- Worn clutch for the affected gear (less common).
How to diagnose5
- Check fluid level, color and smell.
- Identify the affected shift by comparing commanded and actual gear and gear ratio on a scan tool.
- Command solenoid C with the scan tool if possible and note the response.
- Inspect the pan and filter for metal particles or friction material.
- Have the circuit hydraulic pressure measured or the removed solenoid bench tested.
How to fix5
- Top up with the correct fluid, or change it and the filter.
- Replace shift solenoid C or the solenoid pack if it is proven to stick.
- Clean or replace the valve body if its valves are worn.
- Repair the internal leak or worn clutch if proven.
- Clear the codes, run the shift relearn if needed, then road test.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
The cost is low when a fluid change or a new solenoid fixes it, and rises if a valve body or clutch repair is needed.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026
Frequently asked questions
What does a burned fluid smell mean with this code?
It usually means the clutch slipped long enough to burn its lining, and a new solenoid alone may not be enough; the clutches may need inspection or repair.
How does a technician know it is the solenoid and not the clutch?
By bench testing the removed solenoid or measuring its circuit pressure; if the solenoid works and pressure is correct but slipping continues, the clutch or an internal leak is at fault.
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What was wrong? (optional)
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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