Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part inside the car's transmission is slipping when it shouldn't be. It's like trying to run on ice and not getting anywhere.
The transmission control module (TCM) has detected that the friction element 'C' within the transmission is slipping excessively.
P079C is triggered when the TCM detects that the friction element 'C' is not maintaining the correct speed or torque as expected. This can occur due to wear, hydraulic issues, or electronic control problems within the transmission.
• Slipping transmission
• Harsh or delayed shifting
• Check Engine Light illuminated
• Worn or damaged friction element
• Low transmission fluid level
• Faulty transmission control module (TCM)
Transmission Control Module (TCM): An electronic device that controls the transmission's operation.
Friction Element: A component within the transmission that helps transfer power.
• Check transmission fluid level and condition.
• Inspect the transmission for signs of wear or damage.
• Use a scan tool to check for additional transmission-related codes.
• Replace or repair the worn friction element.
• Refill or replace transmission fluid.
• Reprogram or replace the TCM if necessary.
• OBD-II scan tool
• Transmission fluid level gauge
• Basic hand tools
$500 - $1500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular transmission fluid changes
• Routine transmission inspections
• Avoid aggressive driving habits
Transmission Performance
• Avoid driving aggressively until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
Transmission issues may be covered under powertrain warranty. Check with your vehicle manufacturer.
This code has been more prevalent in vehicles with higher mileage or those that have not had regular transmission maintenance.
Moderate – While the vehicle may still be drivable, continued use can lead to more severe transmission damage.
Driving with a slipping transmission can be dangerous and may lead to further damage. Address the issue promptly.
• Vehicle should be at operating temperature.
• Test drive to monitor transmission behavior.
The friction element is located within the transmission assembly.
Q: Can I drive with a P079C code?
A: It's not recommended to drive for extended periods with this code, as it can lead to further transmission damage.
Q: How do I know if my transmission is slipping?
A: You may notice delayed or harsh shifting, or the engine revving higher than usual without an increase in speed.
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