OBD-II code · Powertrain (generic)
P07A4 Transmission Friction Element B Performance/Stuck Off
Transmission Friction Element B Performance/Stuck Off: the actuator is stuck in the off position.
Is it safe to drive with P07A4?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyLeaking apply seal
- Less likelyCarbon or debris buildup preventing free movement
- Less likelyComponent wear with age - mechanical play
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
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 4–14 h
- Emissions test
- Usually unaffected
- Parts involved
- Clutch Pack B, Apply Piston
Related codes
- P07A2Transmission Friction Element A Performance/Stuck Off
- P07A6Transmission Friction Element C Performance/Stuck Off
- P07A8Transmission Friction Element D Performance/Stuck Off
- P07AATransmission Friction Element E Performance/Stuck Off
- P07ACTransmission Friction Element F Performance/Stuck Off
- P07AETransmission Friction Element G Performance/Stuck Off
- P07B0Transmission Friction Element H Performance/Stuck Off
- P07A1Transmission Friction Element H Slip Detected
- P07A3Transmission Friction Element A Stuck On
- P07A5Transmission Friction Element B Stuck On
- P07A7Transmission Friction Element C Stuck On
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.