OBD
P073E
Unable to Engage Reverse
What it means
P073E means Unable to Engage Reverse.
Check these first
- Low or dirty transmission fluid
- A failed reverse solenoid valve
- A faulty transmission range sensor
- A stuck reverse servo
- A TCM command fault
What to do next
- Check the fluid level and condition
- Read the range sensor in reverse
- Command reverse on a scan tool
- Test the reverse solenoid for operation
- Replace the range sensor or solenoid if reverse still fails
- Clear the code and retest
Look up another code
Enter a full code or a symptom. Press / to search. How to read a code
Type a code above, or start from a symptom or a common code.
Updated
Generic SAE J2012 definition. Last updated 2026-10-10.