P07AD: Transmission Friction Element F Stuck On

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. No manufacturer document available to us uses this code; the documented hybrids have at most five monitored clutches. The description follows the family: when clutch F should release, slip stays below the expected profile. A clutch that does not release ties up the transmission, causing jolts or stalling. Slip of the same clutch is P079F.

Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.

Symptoms

Check engine light or 'service hybrid system' message
Jolt or tie-up on mode or gear changes
Engine stalls or drags when stopping
Limp mode with reduced power

Most likely causes

Clutch F stuck, welded or piston hanging
Valve or spool sticking in the applied position
Contaminated fluid (debris)
Module software

What to check, in order

Start with the simplest. You can tick off each step.

Check the fluid level and condition
Use the scanner to command the movement and compare the actual position with the requested one.
Read the input and output speed in live data
Check the connector and wiring
Check for other related engine codes
Consult the manufacturer's procedure for the transmission

Good to know

Repair difficulty: hard
It can trigger limp mode.
It affects emissions.

What each character of P07AD means

P: Powertrain: engine and transmission
0: Generic code: same on every make
7: Transmission
AD: Specific fault in that system

Frequently asked questions

Can I keep driving with code P07AD?

Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.

What causes code P07AD?

The most common causes are: clutch F stuck, welded or piston hanging; valve or spool sticking in the applied position; contaminated fluid (debris).

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.