P07E8
Transmission Range Control A Circuit/Open
The transmission range control A circuit (used in shift-by-wire to drive the shift actuator that physically positions the manual valve in the valve body) is open. The TCM cannot move the manual valve into the commanded range, blocking shifts between P/R/N/D.
- 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.
- Open wire to the range actuatorCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Range Actuator
- Wiring Harness
P07E8 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.