P07A4 code meaning
Transmission Friction Element B Performance/Stuck Off
Powertrain system Generic code P07xx codes Check engine light
What P07A4 means
Each friction element (clutch or brake) has three functional codes: slip while commanded locked (P079A ff), performance/stuck off – it does not apply or applies too weakly – and stuck on – it does not release. P07A4 concerns clutch B. Only Ford's DPS6 PowerShift dry dual-clutch uses it, for clutch B – input shaft 2 with reverse and gears 2, 4 and 6 – as 'functionally stuck off', next to the electrical codes of the clutch B actuator; Ford publishes no thresholds. GM's hybrids report clutch 2 only as slip (P079B) or stuck on (P07A5). A clutch that does not apply means missing even gears or reverse and limp mode.
P07A4 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 12 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P07A4
- Check engine light or transmission warning
- Gear missing or slipping, weak acceleration
- Limp mode
Common causes of P07A4
- Most likelyClutch B plates worn or piston seal leaking
- PossibleToo little apply pressure (fluid, pump, valve)
- PossibleClutch actuator or valve sticking (DCT: electric actuator)
- Less likelyModule software or lost adaption
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission clutchesTransmission valve bodyHybrid control module
What each part of P07A4 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| A4 | The exact fault in that area. |
What to do next
- Note P07A4 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P07A4
What does P07A4 mean?
P07A4 means "Transmission Friction Element B Performance/Stuck Off". Each friction element (clutch or brake) has three functional codes: slip while commanded locked (P079A ff), performance/stuck off – it does not apply or applies too weakly – and stuck on – it does not release. It is a generic code, so it means the same on every make.
Is it safe to drive with P07A4?
Drive gently and only to a workshop. With P07A4 the car can go into limp mode (reduced power) to protect itself.
Will P07A4 fail an emissions test?
Yes, it can. P07A4 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P07A4 to fix?
Difficulty: hard. A typical repair takes 1 to 12 hours of work. This is a job for a workshop.
Will P07A4 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.