OBD Guide

P07D8

Unable To Engage Gear 8

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • The car does not shift into 8th gear
  • Jerks when shifting gears
  • Increased fuel consumption
  • Switching to emergency mode of the gearbox
  • Check Engine light comes on

Causes

  • Low transmission fluid level
  • Shift solenoids malfunction
  • Transmission hydraulic system problems
  • Worn synchronizers or gears
  • Transmission sensor malfunction

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the operation of gear shift solenoids
  3. Check the hydraulic pressure in the system
  4. Scan the transmission control unit for errors
  5. If necessary, replace worn gearbox parts

Related codes

Error P07D8 by Vehicle Brand