P07DA
6-7 Shift
General fault detected during the 6-to-7 upshift event — slipping during the shift, gear-ratio overshoot, or shift completion timeout. Often a worn friction element on the 7th-gear side or a slow shift solenoid.
- 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.
- Worn 7th-gear friction elementCommon
Parts involved
- Clutch Pack
- Shift Solenoid
P07DA 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.