P0887 Transmission control module power relay control circuit high

TCM power relay circuit high

P0887 in short

P0887 means the transmission computer saw a high signal on the circuit that controls its power relay. On some 2014–2015 Jeep Cherokee and Chrysler 200 models, FCA fixes it with a transmission software update. Owners report Service Transmission messages and lost acceleration. Have it inspected soon and ask about the update.

Some transmission computers switch their own power relay. P0887 sets when the relay control circuit reads high when it should not, which can mean a wiring fault, a relay problem or a software fault in the module.

FCA has several bulletins that reprogram the transmission computer for P0887 on the 9-speed 948TE in the Jeep Cherokee and Chrysler 200, and Cherokee owners describe dealers calling it a known software issue.

Most likely causes

  1. Transmission computer software (2014–2015 Jeep Cherokee, 2015 Chrysler 200)

    Supported by vehicle data
    Why it ranks here
    FCA bulletins list P0887 and reprogram the transmission computer on these models, and a Cherokee dealer called it a known software issue.
    What would change this
    Rises on these models if the software is not up to date.
    How to test the transmission control module (tcm)

  2. Power relay or its control wiring

    Common general cause
    Why it ranks here
    The code is defined as a high signal on the relay control circuit.
    What would change this
    Rises if the relay or its wiring tests bad.

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

    • IfP0887 on a Jeep Cherokee or Chrysler 200 with the 9-speed

      It meansLook for the software bulletin.

      Go to step 2

    • IfP0887 on another vehicle

      It meansCheck the relay circuit.

      Go to step 3

  2. Ask a dealer whether a P0887 software update applies to your VIN.

    Low risk

  3. Have a shop test the transmission power relay and its control circuit with the wiring diagram.

    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
  • Service Transmission message
  • Loss of acceleration or stuck in one gear 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. Ask a dealer whether your VIN has an open P0887 bulletin or software update.

On your vehicle

Jeep

  • 2014–2015 · Cherokee

    Supported by vehicle data

    FCA bulletins 21-016-16 and 21-021-15 reprogram the transmission computer for P0887. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 21-016-16Status unverified

    P0887 TCM power control circuit high

    2014cherokee · issued · NHTSA 10076538

    MIL with P0887-00; transmission computer reprogramming. 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.

  • 21-021-15 REV. AStatus unverified

    948TE transmission diagnostic and shift enhancements

    2015cherokee · issued · NHTSA 10148904

    MIL with P0887 and other codes on the 948TE 9-speed; reprogram the transmission computer. Also covers the 2015 Chrysler 200. 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.

Chrysler

  • 2015 · 200

    Supported by vehicle data

    FCA 21-021-15 covers P0887 on the 948TE 9-speed. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 21-021-15 REV. AStatus unverified

    948TE transmission diagnostic and shift enhancements

    2015cherokee · issued · NHTSA 10148904

    MIL with P0887 and other codes on the 948TE 9-speed; reprogram the transmission computer. Also covers the 2015 Chrysler 200. 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.

  • P0884Transmission control module power input signal intermittent

    Same system Possible — needs testing

    P0884 is the intermittent TCM power input code; both involve the transmission computer's power supply.

All Transmission codes

Sources and review

  1. Toyota Camry Owner's Manual (OM06291U) — Toyota
  2. FCA 21-016-16: P0887 TCM power control circuit high — FCA US LLC ,
  3. NHTSA complaint 11424171: 2016 Jeep Cherokee, P0887 — NHTSA Office of Defects Investigation
  4. Cal. Code Regs. Tit. 13, § 1968.2 — Malfunction and Diagnostic System Requirements (OBD II) — California Air Resources Board (via Cornell LII)
  5. FCA 21-021-15: 948TE transmission diagnostic and shift enhancements (flash) — FCA US LLC ,
  6. P0887 TCM Power Relay Control Circuit High — TAT Scan Data (Australia)
  7. P0884 OBD-II Trouble Code: TCM Power Input Signal Intermittent — Kelley Blue Book
Last reviewed
Written by
Saurabh K.
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