Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a part that controls how smoothly it changes gears, and it's stuck in the 'on' position, which might make your car shift gears weirdly.
The transmission control module (TCM) has detected that the pressure control solenoid C is stuck in the 'on' position, affecting the transmission's ability to shift gears properly.
The pressure control solenoid C is responsible for regulating hydraulic pressure in the transmission to ensure smooth gear shifts. When this solenoid is stuck on, it can cause the transmission to behave erratically, leading to harsh or delayed shifts.
• Harsh or erratic shifting
• Transmission slipping
• Increased fuel consumption
• Check Engine Light is on
• Faulty pressure control solenoid C
• Transmission fluid issues (dirty or low)
• Wiring problems or poor electrical connections
• Faulty transmission control module (TCM)
Transmission Control Module (TCM): A computer that controls the transmission operations.
Solenoid: An electromechanical device that controls fluid flow in the transmission.
• Check the transmission fluid level and condition.
• Inspect the wiring and connectors to the solenoid.
• Test the pressure control solenoid C for proper operation.
• Scan the TCM for additional codes.
• Replace the pressure control solenoid C if faulty.
• Repair or replace damaged wiring or connectors.
• Flush and replace the transmission fluid if contaminated.
• Replace or reprogram the TCM if necessary.
• OBD-II scanner
• Multimeter
• Transmission fluid pressure gauge
$200 - $500
Moderate
• Honda Accord
• Ford F-150
• Chevrolet Silverado
• Regularly check and maintain transmission fluid levels.
• Perform routine transmission services.
• Address transmission issues promptly to prevent further damage.
Transmission Issue
• Have your transmission fluid checked regularly.
• Address any transmission warning signs early.
• Consult a professional mechanic for accurate diagnosis.
Transmission components may be covered under powertrain warranty, check with your manufacturer.
This code has been associated with transmission issues in various vehicles, often due to solenoid or fluid problems.
Moderate – Should be addressed soon to prevent further transmission damage.
Driving with transmission issues can lead to unsafe driving conditions. Address this issue promptly.
• Vehicle at operating temperature
• Transmission in drive mode
The pressure control solenoid C is located inside the transmission, typically accessible by removing the transmission pan.
Q: Can I drive my car with a P0797 code?
A: It's not recommended to drive with this code as it can lead to further transmission damage.
Q: How do I know if my solenoid is bad?
A: Symptoms like erratic shifting or slipping can indicate a bad solenoid. A professional diagnosis is recommended.
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