P079B

Transmission Friction Element B Slip Detected

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

Symptoms

Jerks when shifting gears
Delays when shifting gears
Power Loss
Increased engine speed without increasing speed
Check Engine light comes on

Causes

Wear of friction linings of element B
Low or contaminated transmission fluid
Problems with the hydraulic system (pump, valves)
Malfunction of control solenoids
Mechanical damage inside the gearbox

How to Fix

Check the level and condition of the transmission fluid
Conduct diagnostics of the hydraulic system and solenoids
Replace friction linings of element B if necessary
Check and replace pump or valves if necessary
Adapt the gearbox after repair

Related codes

P079A P079C P079D