P072B
Stuck In Reverse
Transmission / gear engagement
Generic OBD-II
High
What it means
P072B means the transmission control module detects that the transmission is stuck in reverse or is not changing to the gear it commanded. This usually points to a stuck shift solenoid, a valve-body problem, low or dirty fluid, or an internal mechanical fault. Because the transmission is not responding normally, it is best to have the car diagnosed before driving.
High
Can I keep driving? Not recommended — the transmission is not selecting gears as commanded and may be stuck, so have it towed or diagnosed before driving far.
Common symptoms
What you'll notice
- Check-engine light on, often with a transmission warning
- Transmission stays engaged in reverse or will not select the commanded gear
- Harsh or unexpected gear engagement
- Transmission drops into limp mode
Common causes
Most likely first
- Stuck shift solenoid or valve body faultLikely
- Low or contaminated transmission fluidCommon
- Wiring or connector fault to the shift solenoidsCommon
- Internal mechanical fault in the transmission, or a TCM faultLess often
How to diagnose & fix
Work through it in order
- Scan for accompanying solenoid or gear-ratio codes to pinpoint the failed circuit.
- Check the transmission fluid level and condition.
- Inspect the solenoid and valve-body wiring and connectors for faults.
- If solenoids and wiring test good, an internal transmission fault is likely — seek professional diagnosis. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P072B?+
No — if the transmission is stuck or not selecting gears as commanded, driving risks damage, so have it diagnosed first.
Can I just clear P072B?+
It will return, and the underlying solenoid, fluid, or internal fault still needs repair.
Related codes
Often seen with P072B
Read & clear P072B yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX