Pressure Control Solenoid "C" Control Circuit Range/Performance
P0969 indicates the transmission pressure control solenoid C is not responding correctly to commands from the PCM, causing improper fluid pressure regulation. This fault affects transmission shift quality and can trigger limp mode, restricting vehicle performance and fuel economy.
What You Might Notice
- Check Engine Light activated
- Transmission slips when shifting
- Transmission shifts hard or bangs into gear
- Increased fuel consumption
- Transmission overheating or limp mode engagement
Most Common Causes
- 1
Faulty Pressure Control Solenoid C
The solenoid is stuck, burned out, or electrically open, preventing proper valve response to PCM commands for pressure regulation.
- 2
Wiring or Connector Issues
Corrosion, loose connections, or damaged wiring in the solenoid control circuit reduces signal integrity between the PCM and solenoid.
- 3
Low or Contaminated Transmission Fluid
Degraded fluid or low level reduces solenoid response efficiency and causes erratic pressure control and shifting problems.
- 4
PCM Programming Issue or Sensor Fault
A faulty transmission fluid pressure sensor or outdated PCM calibration can send incorrect signals, causing solenoid control errors.
How to Diagnose It
- 1
Check Faulty Pressure Control Solenoid C — The solenoid is stuck, burned out, or electrically open, preventing proper valve response to PCM commands for pressure regulation.
- 2
Check Wiring or Connector Issues — Corrosion, loose connections, or damaged wiring in the solenoid control circuit reduces signal integrity between the PCM and solenoid.
- 3
Check Low or Contaminated Transmission Fluid — Degraded fluid or low level reduces solenoid response efficiency and causes erratic pressure control and shifting problems.
- 4
Check PCM Programming Issue or Sensor Fault — A faulty transmission fluid pressure sensor or outdated PCM calibration can send incorrect signals, causing solenoid control errors.
How to Fix It
- 1
Replace Pressure Control Solenoid C
Remove and install a new pressure control solenoid C assembly, ensuring proper electrical connections and torque specifications are met.
- 2
Inspect and Repair Wiring and Connectors
Check the solenoid control circuit for corrosion, loose pins, or damaged wires; clean connectors and repair or replace damaged wiring as needed.
- 3
Change Transmission Fluid and Filter
Drain and replace transmission fluid with the correct specification and install a new transmission filter to restore solenoid responsiveness.
- 4
Test and Replace Fluid Pressure Sensor if Needed
Use a scan tool to verify transmission fluid pressure readings; replace the pressure sensor if readings are out of range or erratic.
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