Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that a part inside the car's transmission, like a clutch, is slipping and not working properly. It's like when your shoes slip on a wet floor.
The transmission control module (TCM) detects that the friction element 'A' is slipping more than expected, indicating a potential issue with the transmission's ability to engage properly.
The code P079A is set when the TCM identifies that the friction element 'A' within the transmission is not maintaining the expected engagement. This can be due to wear, hydraulic pressure issues, or electronic control problems. The slipping is detected through sensors that monitor the speed and engagement of the transmission components.
• Check Engine Light is on
• Transmission slipping
• Poor acceleration
• Worn or damaged friction element
• Low transmission fluid level
• Faulty transmission control module
Transmission Control Module (TCM): An electronic device that manages the operation of the transmission.
Friction Element: Components such as clutches or bands that help engage gears in the transmission.
• Check transmission fluid level and condition
• Inspect for transmission leaks
• Perform a diagnostic scan to check for additional codes
• Replace or repair the worn friction element
• Refill or flush transmission fluid
• Reprogram or replace the transmission control module
• OBD-II scanner
• Transmission fluid pressure gauge
• Basic hand tools
$500 - $2000
Difficult
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular transmission fluid checks
• Scheduled transmission maintenance
• Avoid aggressive driving habits
Transmission Performance
• Avoid driving the vehicle until repaired
• Consult a professional mechanic
• Do not ignore the warning signs
Check vehicle warranty for transmission coverage; often covered under powertrain warranty.
This code has been more prevalent with the advent of electronically controlled transmissions, as they rely heavily on sensor data to function correctly.
High – Immediate attention is recommended to prevent further transmission damage.
Driving with a slipping transmission can be dangerous, as it may lead to unexpected vehicle behavior.
• Vehicle must be at operating temperature
• Transmission must be engaged in drive
The friction elements are located inside the transmission assembly, typically accessible only by removing the transmission.
Q: Can I drive with a P079A code?
A: It's not recommended to drive with this code, as it can cause further damage to the transmission.
Q: How can I prevent transmission slipping?
A: Regular maintenance, including fluid changes and avoiding aggressive driving, can help prevent slipping.
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