P07E4 Transmission unable to engage Park

Unable to engage Park

P07E4 in short

P07E4 means the transmission could not engage Park when requested. A mechanical fault is common, such as the park manual release cable not stowed or wrong, or a park valve leak. Carly calls it not serious for now, but the car may not hold in park, so have it checked soon.

On many newer automatics Park is engaged by the computer and a mechanical park system. P07E4 sets when the computer commands Park and the position feedback shows it did not engage.

GEARS Magazine describes a 2020 Ford Escape where a faulty or wrongly routed park manual release cable caused the code, and says it is a mechanical, not electrical, problem. Ford TSB 20-2265 covers Escape and Corsair cars with the same symptom.

Ford also lists P07E4 with loose grounds on some 2020-2021 Explorers and Aviators, and with a park valve leak on 10R-series transmissions. Ram has a software update for the 2019 Ram 1500.

Most likely causes

  1. Park manual release cable wrong or not stowed (2020 Escape/Corsair)

    Supported by vehicle data
    Why it ranks here
    Ford TSB 20-2265 and the GEARS Magazine case both name the park manual release cable on 8F transmissions.
    What would change this
    Rises on a covered Escape or Corsair, especially after underhood or transmission work.

  2. Park valve circuit leak, separator plate (2018-2021 Ford and Lincoln 10R)

    Supported by vehicle data
    Why it ranks here
    Ford TSB 22-2145 ties neutral-out with P07E6 and/or P07E4 to a leak in the park valve circuit.
    What would change this
    Rises on a covered truck or SUV with a momentary neutral-out in Drive.

  3. Loose body grounds G210 and G214 (2020-2021 Explorer/Aviator)

    Supported by vehicle data
    Why it ranks here
    Ford SSM 49329 lists P07E4 with B135C and U0103, no crank or remote start, and a wrench light.
    What would change this
    Rises if several modules set communication codes at once.

  4. Transmission module software (2019 Ram 1500)

    Supported by vehicle data
    Why it ranks here
    Ram 21-033-20 reflashes the module for a MIL with P07E4-00 among the codes.
    What would change this
    Rises on a covered Ram.
    How to test the transmission control module (tcm)

  5. Other mechanical park system fault

    Possible — needs testing
    Why it ranks here
    GEARS Magazine says the cause is mechanical, not electrical, so linkage, shifter or park mechanism faults are worth testing.
    What would change this
    Rises when the cable and valve are ruled out.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read codes with a scan tool that supports the transmission and body modules, before anything is cleared. Note P07E6, B135C, U0103 or any park status reading.

    Low riskTool: scan tool that reads the transmission module

  2. Look at the underhood end of the park manual release cable and confirm it is routed and stowed as the maker shows, without any pull on the transmission lever.

    Low risk

  3. Have a shop watch the park status reading and disconnect the cable at the transmission. If park then engages, the cable is the fault.

    Best left to a shopTool: scan tool with live data

    Warning:Shop test. The car may not hold on a slope, so chock the wheels.

Symptoms

  • Wrench or transmission warning lamp
  • Shift system fault message
  • Electronic parking brake applies by itself
  • Car moves in park or shifts to neutral in Drive Gets more serious: stop and have it checked.

How to fix

  1. Use the parking brake and chock a wheel on a slope until a shop confirms park holds.

  2. Ask a dealer whether your VIN has an open bulletin. Ford and Ram have published several.

Parts and cost context

  • Transmission control module (TCM):Do not replace the module for P07E4. Ram handles one case with software and Ford ties other cases to a cable or valve body.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Ford

  • 2020 · Escape

    Supported by vehicle data

    2020 Escape and Corsair with 8F24, 8F35 or 8F40: unable to engage park, wrench lamp, P07E4, shift system fault message, electronic parking brake applied when park is requested. Caused by an incorrect or unstowed underhood section of the park manual release cable. Whether the bulletin is still current is not verified.

  • 2018–2021 · Explorer

    Supported by vehicle data

    2020-2021 Aviator and Explorer with intermittent no crank, inoperative remote start or wrench light with P07E4, B135C and/or U0103, possibly from loose grounds G210 and G214. 2018-2021 Expedition and Navigator and 2020-2021 Explorer and Aviator with 10R80 or 10R60: momentary neutral-out in Drive, possibly P07E6 and/or P07E4 and noise, from a leak in the park valve circuit. Replace the valve body separator plate with the improved one. Whether the bulletin is still current is not verified.

  • 2018–2021 · Expedition

    Supported by vehicle data

    2018-2021 Expedition and Navigator and 2020-2021 Explorer and Aviator with 10R80 or 10R60: momentary neutral-out in Drive, possibly P07E6 and/or P07E4 and noise, from a leak in the park valve circuit. Replace the valve body separator plate with the improved one. Whether the bulletin is still current is not verified.

  • TSB 20-2265Status unverified

    Ford TSB 20-2265: 2020 Escape/Corsair unable to engage park, P07E4

    2020escape · NHTSA 10180341

    2020 Escape and Corsair with 8F24, 8F35 or 8F40: unable to engage park, wrench lamp, P07E4, shift system fault message, electronic parking brake applied when park is requested. Caused by an incorrect or unstowed underhood section of the park manual release cable.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • SSM 49329Status unverified

    Ford SSM 49329: Aviator/Explorer no crank, wrench light, P07E4, B135C, U0103

    2020–2021explorer · NHTSA 10183390

    2020-2021 Aviator and Explorer with intermittent no crank, inoperative remote start or wrench light with P07E4, B135C and/or U0103, possibly from loose grounds G210 and G214.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • TSB 22-2145 (Ford)Status unverified

    Ford TSB 22-2145: momentary neutral-out in Drive, P07E6 and/or P07E4

    2018–2021explorer, expedition · NHTSA 10214870

    2018-2021 Expedition and Navigator and 2020-2021 Explorer and Aviator with 10R80 or 10R60: momentary neutral-out in Drive, possibly P07E6 and/or P07E4 and noise, from a leak in the park valve circuit. Replace the valve body separator plate with the improved one.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Lincoln

  • 2020 · Corsair

    Supported by vehicle data

    2020 Escape and Corsair with 8F24, 8F35 or 8F40: unable to engage park, wrench lamp, P07E4, shift system fault message, electronic parking brake applied when park is requested. Caused by an incorrect or unstowed underhood section of the park manual release cable. Whether the bulletin is still current is not verified.

  • 2018–2021 · Aviator

    Supported by vehicle data

    2020-2021 Aviator and Explorer with intermittent no crank, inoperative remote start or wrench light with P07E4, B135C and/or U0103, possibly from loose grounds G210 and G214. 2018-2021 Expedition and Navigator and 2020-2021 Explorer and Aviator with 10R80 or 10R60: momentary neutral-out in Drive, possibly P07E6 and/or P07E4 and noise, from a leak in the park valve circuit. Replace the valve body separator plate with the improved one. Whether the bulletin is still current is not verified.

  • 2018–2021 · Navigator

    Supported by vehicle data

    2018-2021 Expedition and Navigator and 2020-2021 Explorer and Aviator with 10R80 or 10R60: momentary neutral-out in Drive, possibly P07E6 and/or P07E4 and noise, from a leak in the park valve circuit. Replace the valve body separator plate with the improved one. Whether the bulletin is still current is not verified.

  • TSB 20-2265 (Lincoln)Status unverified

    Ford TSB 20-2265: 2020 Escape/Corsair unable to engage park, P07E4

    2020corsair · NHTSA 10180341

    2020 Escape and Corsair with 8F24, 8F35 or 8F40: unable to engage park, wrench lamp, P07E4, shift system fault message, electronic parking brake applied when park is requested. Caused by an incorrect or unstowed underhood section of the park manual release cable.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • SSM 49329 (Lincoln)Status unverified

    Ford SSM 49329: Aviator/Explorer no crank, wrench light, P07E4, B135C, U0103

    2020–2021aviator · NHTSA 10183390

    2020-2021 Aviator and Explorer with intermittent no crank, inoperative remote start or wrench light with P07E4, B135C and/or U0103, possibly from loose grounds G210 and G214.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • TSB 22-2145Status unverified

    Ford TSB 22-2145: momentary neutral-out in Drive, P07E6 and/or P07E4

    2018–2021aviator, navigator · NHTSA 10214870

    2018-2021 Expedition and Navigator and 2020-2021 Explorer and Aviator with 10R80 or 10R60: momentary neutral-out in Drive, possibly P07E6 and/or P07E4 and noise, from a leak in the park valve circuit. Replace the valve body separator plate with the improved one.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Ram

  • 2019 · 1500

    Supported by vehicle data

    2019 Ram 1500: reprogram the TCM for MIL with codes that include P07E4 (unable to engage park) and P0735, plus an improvement to shifter auto-position correction during an AutoPark event. Whether the bulletin is still current is not verified.

  • 21-033-20Status unverified

    Ram 21-033-20: TCM software flash, P07E4 among codes

    20191500 · NHTSA 10175740

    2019 Ram 1500: reprogram the TCM for MIL with codes that include P07E4 (unable to engage park) and P0735, plus an improvement to shifter auto-position correction during an AutoPark event.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

All Transmission codes

P07E4 questions

Is P07E4 an electrical problem?

Often not. GEARS Magazine describes a case where the park manual release cable was at fault, which is mechanical, and Ford also ties it to a park valve leak.

Can I drive with P07E4?

Have it checked soon. Carly says it is not serious for now, but the car may not hold in park, so use the parking brake and wheel chocks on slopes.

Sources and review

  1. P07E4 Unable to Engage Park — Carly
  2. Ford TSB 20-2265: 2020 Escape/Corsair unable to engage park, P07E4 — Ford
  3. Ford TSB 22-2145: momentary neutral-out in Drive, P07E6 and/or P07E4 — Ford
  4. A Ford Escape with an 8F24 and park control issues (Keep Those Trannys Rolling) — GEARS Magazine
  5. Ford SSM 49329: Aviator/Explorer no crank, wrench light, P07E4, B135C, U0103 — Ford
  6. Ram 21-033-20: TCM software flash, P07E4 among codes — Ram
Last reviewed
Written by
Saurabh K.
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