P073B
Stuck in Gear 6
The transmission is mechanically stuck in gear 6 and will not shift out of it. A shift solenoid or hydraulic valve on the gear-6 circuit has jammed, or a clutch/band has failed to release. Symptoms are no up- or downshifts, harsh behaviour, and often limp mode. Causes: a stuck or failed shift solenoid, a valve-body fault, a hydraulic pressure problem, or internal mechanical damage.
- 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.
- Shift solenoid stuckCommon
Parts involved
- Transmission
P073B 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.