P079C

Transmission Friction Element C Slip Detected

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Delays when shifting gears
Slipping when shifting gears
Unexpected gear changes
Transmission of the gearbox into emergency mode
Increased engine speed when switching

Causes

Wear of friction linings of element C
Low transmission fluid level
Contaminated or degraded transmission fluid
Transmission hydraulic pressure problems
Malfunction of transmission control solenoids

How to Fix

Check the level and condition of the transmission fluid
Carry out diagnostics of hydraulic pressure in the gearbox
Check operation of control solenoids
If necessary, replace the friction elements of element C
Severe damage may require transmission repair or replacement.

Related codes

P079A P079B P079D