Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part in your car's transmission that helps it change gears. It's like a switch that tells the car when to shift gears, and it's not working right.
The P0786 code indicates a problem with the shift timing solenoid A, which affects the timing of gear shifts in the transmission.
The shift timing solenoid is responsible for controlling the hydraulic pressure that engages the transmission's clutches and bands. When the solenoid's performance is out of range, it can cause improper shifting or transmission slippage.
• Erratic or harsh shifting
• Transmission slipping
• Check Engine Light illuminated
• Poor fuel economy
• Faulty shift timing solenoid A
• Transmission fluid issues (low level or contamination)
• Wiring problems or poor electrical connections
• Faulty transmission control module (TCM)
Solenoid: An electromechanical device used to control the flow of fluid in the transmission.
Transmission Control Module (TCM): A computer that controls the operation of the transmission.
• Check transmission fluid level and condition
• Inspect wiring and connectors to the solenoid
• Test the shift timing solenoid A for proper operation
• Scan for additional trouble codes
• Replace or repair faulty shift timing solenoid A
• Flush and replace transmission fluid
• Repair or replace damaged wiring/connectors
• Reprogram or replace the transmission control module if necessary
• OBD-II scanner
• Multimeter
• Transmission fluid pressure gauge
$150 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly check and maintain transmission fluid levels
• Ensure timely transmission service and fluid changes
• Inspect wiring and connectors periodically
Transmission Performance
• Avoid driving aggressively until the issue is fixed
• Get the transmission inspected by a professional
• Monitor for any worsening symptoms
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been commonly reported in vehicles with higher mileage or those that have not had regular transmission maintenance.
Moderate – This issue should be addressed soon to prevent further transmission damage.
Driving with a malfunctioning transmission can be unsafe and may lead to more costly repairs.
• Vehicle should be at operating temperature
• Test drive to observe shifting behavior
The shift timing solenoid is located inside the transmission, often accessible by removing the transmission pan.
Q: Can I drive with a P0786 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to further transmission damage.
Q: Will fixing the solenoid clear the code?
A: Yes, repairing or replacing the faulty solenoid should clear the code, but the vehicle may need to be driven for a few cycles or the code cleared manually with a scanner.
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