P179C
Main Pressure Valve Electric Fault
P179C is an OBD-II diagnostic trouble code meaning: Main Pressure Valve Electric Fault. Common causes: open or short circuit in valve circuit, solenoid valve malfunction. Estimated repair cost: $28–89.
Symptoms
- Incorrect gear shifting
- Dips when switching
- Delays when shifting gears
- Switching to emergency transmission mode
- Check Engine Light Illuminates
Causes
- Open or short circuit in valve circuit
- Solenoid valve malfunction
- Problems with the wiring harness or connectors
- Low or contaminated transmission fluid
- Mechanical damage inside the transmission
How to Fix
- Check the level and condition of the transmission fluid
- Diagnose the valve electrical circuit
- Check the resistance and operation of the solenoid valve
- Inspect connectors and wiring harness for damage
- If necessary, replace the valve or repair the wiring
Related codes
FAQ
What does the P179C code mean?
P179C is an OBD-II diagnostic trouble code that indicates: Main Pressure Valve Electric Fault
What causes a P179C error code?
The most common causes of P179C include: Open or short circuit in valve circuit; Solenoid valve malfunction; Problems with the wiring harness or connectors; Low or contaminated transmission fluid.
How do I fix a P179C diagnostic trouble code?
To fix P179C: Check the level and condition of the transmission fluid. Diagnose the valve electrical circuit. Check the resistance and operation of the solenoid valve. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P179C?
Limited driving only, diagnose soon
How much does it cost to fix P179C?
The estimated repair cost for P179C is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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