P07D7
Stuck in Gear 8
The transmission has entered 8th gear but cannot leave it on command — typically a stuck shift solenoid or a stuck-on friction element holding the 8th-gear pattern locked. The TCM forces limp-home mode if upshift/downshift attempts fail repeatedly.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
Ordered by how often each turns out to be the cause.
- Stuck shift solenoidCommon
- Stuck-on friction elementPossible
Parts involved
- Shift Solenoid
- Clutch Pack
P07D7 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.