P079A

Transmission Friction Element A 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 accelerating
Unexpected shifts to neutral
Increased engine speed without increasing speed
Check engine light comes on

Causes

Low transmission fluid level
Worn friction linings
Contaminated or degraded transmission fluid
Hydraulic pressure problems
Mechanical damage in the gearbox

How to Fix

Check the level and condition of the transmission fluid
Replace transmission fluid and filter if necessary
Conduct hydraulic pressure diagnostics
Check the condition of the friction elements
If necessary, replace damaged gearbox components

Related codes

P079B P079C P079D