P0884 Transmission control module power input signal intermittent

TCM power input intermittent

P0884 in short

P0884 means the transmission computer saw its power supply drop out briefly. Shifting can become harsh or erratic, and some owners report stalling or loss of drive. Loose connections, a relay or fuse, low battery voltage and the module itself are common causes. Have it inspected soon, and stop driving if it stalls.

The transmission computer needs a steady battery and ignition feed. P0884 sets when that power input is lost or dips for short moments and then comes back, which is why it is called intermittent.

Because the fault comes and goes, a shop may not reproduce it. Start with the battery, grounds, fuses and connectors. Ford lists P0884 in a bulletin about delayed engagement on 2012–2013 Focus models.

Most likely causes

  1. Loose, corroded or damaged power or ground connections

    Common general cause
    Why it ranks here
    Open or shorted connections, loose wires and connector pins are the main causes listed.
    What would change this
    Rises if a connector, ground or battery terminal is loose or corroded.

  2. Power relay or fuse problem

    Common general cause
    Why it ranks here
    A relay or fuse problem is a listed cause.
    What would change this
    Rises if the fuse or relay is loose, damaged or tests bad.

  3. Low battery or charging voltage

    Common general cause
    Why it ranks here
    Low battery voltage is listed as a cause.
    What would change this
    Rises if the battery or charging system tests weak.

  4. Transmission computer or its software (some Ford Focus/Fiesta)

    Supported by vehicle data
    Why it ranks here
    Ford lists P0884 in a 2012–2013 Focus bulletin, and a 2011 Fiesta dealer reprogrammed the engine and transmission computers for it.
    What would change this
    Rises on those models, or if wiring and power test good.
    How to test the transmission control module (tcm)

What to test first

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

  1. Read codes from the engine and transmission modules with a scan tool that supports both, before anything is cleared.

    Low riskTool: scan tool that reads the transmission module

  2. Check for a P0884 bulletin or software update for your VIN at a dealer or on the NHTSA site.

    Low risk

  3. Have a shop test the battery and charging, then check the transmission computer power, ground and relay circuits while wiggling the harness.

    Best left to a shopTool: scan tool with transmission data and output controls

    Warning:Shop test. It needs the maker's wiring diagram.

Symptoms

  • Check engine light
  • Harsh or failed shifts
  • Gear display flashing
  • Stalling or loss of drive while moving Gets more serious: stop and have it checked.

How to fix

  1. Do not clear the code before the transmission module has been read; the stored data helps the shop.

  2. Have the battery and charging system tested, and check that the battery terminals are clean and tight.

  3. Check the transmission fuses listed in the owner's manual.

  4. Ask a dealer whether your VIN has an open P0884 bulletin or software update.

On your vehicle

Ford

  • 2012–2013 · Focus

    Supported by vehicle data

    Ford ASI-44686 lists P0884 with intermittent or delayed engagement. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • ASI-44686Status unverified

    Intermittent or delayed engagement with P0884 and other codes

    2012–2013focus · issued · NHTSA 10056788

    Intermittent or delayed engagement from Park, Drive or Reverse, with or without P0884 and other powertrain codes. Only the NHTSA flat-file summary was read, not the bulletin itself.

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

Jeep

  • 2007 · Grand Cherokee

    Supported by vehicle data

    Several owners report stalling with P0884 stored, and dealers could not always reproduce it, per complaints to NHTSA. These are owner reports, not a bulletin.

  • P0887Transmission control module power relay control circuit high

    Same system Possible — needs testing

    P0887 is the TCM power relay control circuit high code; both involve the transmission computer's power supply.

  • P0700Transmission module requests the check engine light

    Primary / secondary Possible — needs testing

    Likely primary: P0884. On cars with a separate transmission module a basic reader may show only P0700; P0884 can be the module's own code.

All Transmission codes

Sources and review

  1. P0884 OBD-II Trouble Code: TCM Power Input Signal Intermittent — Kelley Blue Book
  2. Toyota Camry Owner's Manual (OM06291U) — Toyota
  3. NHTSA complaint 10452825: 2007 Jeep Grand Cherokee, P0884 — NHTSA Office of Defects Investigation
  4. NHTSA complaint 10628350: 2008 Dodge Ram 1500, P0884 — NHTSA Office of Defects Investigation
  5. NHTSA complaint 11353469: 2011 Ford Fiesta, P0884 — NHTSA Office of Defects Investigation
  6. Ford ASI-44686: Focus delayed engagement with P0884 and other DTCs — Ford Motor Company ,
  7. P0887 TCM Power Relay Control Circuit High — TAT Scan Data (Australia)
Last reviewed
Written by
Saurabh K.
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