P07D9

Gear 8 Incorrect Ratio

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$89–556 (est.)

Symptoms

Jerks when shifting to 8th gear
Switching the box to emergency mode
Increased fuel consumption
Delays when shifting gears
Unstable operation at high speed

Causes

Low or contaminated transmission fluid
Wear of 8th gear clutches
Problems with the 8th gear control solenoid
Mechanical damage to gears or shafts
TCM Software Errors

How to Fix

Check the level and condition of the transmission fluid
Diagnose the operation of automatic transmission solenoids
Adapt the gearbox
Update TCM software
Disassemble and check the mechanical part of the 8th gear

Related codes

P07DA P07DB P07DC