P07AD

Code

LAND ROVER P — Powertrain

Friction element of transmission F - Fixed on

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 13 EN: 20 RU: 15

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Hold/apply circuit for friction element F is stuck energized
Solenoid valve for friction element F mechanically stuck or seized
Hydraulic valve body blockage or stuck spool
Internal clutch/friction pack mechanical seizure or stuck plates
Low, contaminated, or aerated transmission fluid
Wiring short to power, short to ground, open, or poor connector connection

Symptoms

Malfunction Indicator Lamp (MIL)/TCM fault lamp illuminated
One or more gears stuck, harsh or incomplete shifts
Transmission may be held in a single gear / limp mode
Delayed release of gear when commanded or flare/rev during shifts
Loss of torque converter lockup or unexpected lockup
Transmission overheating or unusual noise

What to check

Read freeze frame and full transmission code list with a capable scan tool
Check transmission fluid level, color, and odor for contamination/burning
Visually inspect wiring and connectors at TCM and valve body/solenoid pack for damage, corrosion, or looseness
Command friction element F ON and OFF with a scan tool and observe behavior and PID values
Measure solenoid coil resistance and compare to specification
Check for related pressure/flow PIDs while commanding the solenoid

Signal parameters

Solenoid duty cycle range when commanded: 0–100% PWM
Typical solenoid coil resistance (manufacturer-specific): ~5–40 Ω (measure)
Nominal current draw when energized: ~0.5–3 A (measure)
Hydraulic apply pressure expected when ON: 0–1500 kPa (0–220 psi) depending on gear and design
TCM output voltage to solenoid: ~0–12 V PWM; OFF = near 0 V, ON = near battery voltage (check with scope)
Monitor transmission pressure/target vs actual PIDs when commanding clutch

Diagnostic algorithm

Retrieve all transmission and powertrain codes and freeze frame data; note any related codes and instrumented PIDs.
Verify fluid level, condition and service history. Replace or top up per manufacturer spec if fluid is low or heavily contaminated; recheck after service.
Visually inspect wiring, connectors, ground points and fuses related to transmission solenoids and TCM for corrosion, damage or poor connection.
With a scan tool, command friction element F ON and OFF while monitoring solenoid status, duty cycle, current draw and relevant pressure PIDs. Note if commanded state matches actual response.
Measure solenoid coil resistance at the harness and at the valve body (with connector disconnected). Compare to spec. Check for short to battery or ground.
Backprobe or scope the solenoid supply/command circuit to confirm PWM voltage and that TCM is issuing proper command signals. Check continuity between TCM connector and solenoid.
If electrical checks pass but the clutch remains applied, perform hydraulic tests: measure line/apply pressure with a transmission pressure gauge while commanding the element off/on to confirm valve action.
If pressure tests indicate valve stuck or no change, remove valve body/solenoid pack for bench inspection. Look for clogged passages, varnish, broken springs or stuck spools. Replace or rebuild valve body/solenoid as required.
Inspect friction plates and clutch pack for welding, scoring or seizure if mechanical failure suspected; replace clutch pack if seized.
After repair, clear codes, reset adaptations, and perform road test and functional tests with scan tool. Monitor for reoccurrence. If intermittent or electrical driver faults suspected, consider TCM testing/replacement per manufacturer procedures.

Likely causes

Friction element F apply solenoid coil shorted internally or to battery
Valve body bore or spool contaminated with deposits preventing release
Check valve or return passage clogged or stuck
Friction pack welded or stuck together due to overheating/contamination
Connector corroded or pins pushed out at solenoid harness
Broken or collapsed hydraulic line or failed accumulator spring

Fault status

⚠️ Status

Friction element F — control/valve stuck ON (TCM detects continuous apply).

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 2.0-6.0 hours

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P07AD — Friction element of transmission F - Fixed on