P088E

Planetary Gear Set Failure

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–556 (est.)

Symptoms

Incorrect gear shifting
Switching delays
Gear slip
Clicking or knocking noises from the transmission
Switching to emergency mode

Causes

Wear of planetary gears
Insufficient transmission fluid level
ATF contamination or degradation
Damage to planetary gear bearings
Problems with the hydraulic control unit

How to Fix

Check the level and condition of the ATF fluid
Diagnose pressure in the hydraulic system
Check the mechanism with a scanner
Disassemble and inspect the planetary gear
Replace damaged components or the entire mechanism