P2107 The throttle actuator control module has reported an internal processor fault

Throttle actuator control (TAC) module processor fault

P2107 in short

P2107 means the throttle actuator control module, which drives the electronic throttle, has reported a processor fault. Bulletins link it to no throttle response, low power or no-start, and a computer reflash fixed it on one Mazda. It is not a code to drive on. Get it checked soon.

On cars with an electronic throttle, a control module moves the throttle in response to the pedal. P2107 sets when that module reports an internal processor error. TroubleCodes.net names the module itself as the probable cause.

Older bulletins show the pattern: a Ford bulletin describes no throttle response when pressing the pedal with P2107, P2108 and P0562 stored, and Mazda special program MSP04 reflashes the computer for no start or lack of power with P2107, P2108, P2402 or P0420 on the 2004 RX-8.

Other codes often set with P2107 (power supply, throttle performance), so a low or unstable power feed to the module is worth checking before replacing it.

Most likely causes

  1. Throttle actuator control module or the engine computer that contains it

    Common general cause
    Why it ranks here
    TroubleCodes.net names the TAC module itself as the probable cause of P2107.
    What would change this
    Rises if power, ground and wiring test good and the code returns. Falls if a power or ground fault is found.
    How to test the engine control module (ecm / pcm)

  2. Computer software that needs a reflash

    Supported by vehicle data
    Why it ranks here
    Mazda special program MSP04 reflashes the PCM for P2107 with no-start and lack of power on the 2004 RX-8.
    What would change this
    Rises on the RX-8 if the PCM is not at the latest software. Falls if it is current.
    How to test the engine control module (ecm / pcm)

  3. Low or unstable power or ground at the module

    Supported by vehicle data
    Why it ranks here
    A Ford bulletin lists P0562 (system voltage low) with P2107 and P2108 for no throttle response, and a 2004 Explorer bulletin lists P2107 with P0606 and U0300 and a delayed crank.
    What would change this
    Rises if the battery or charging system is weak or P0562 is stored. Falls if voltage is steady.

What to test first

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

  1. Read all codes. Note P0562 or other power-supply, throttle performance (P2108) or processor (P0606) codes stored with P2107.

    Low risk

    • IfP0562 or other power codes are stored

      It meansCheck the battery, charging system and module power and ground first.

      Go to step 2

    • IfP2107 is the only code

      It meansCheck for a software update.

      Go to step 2

  2. Test the battery and charging voltage, and ask a dealer whether your VIN has a reflash or bulletin for P2107.

    Low riskTool: multimeter, scan tool

Symptoms

  • Check engine light or an electronic throttle warning light
  • Reduced power or limp mode
  • No response from the pedal, engine stays at idle, or stalling Gets more serious: stop and have it checked.
  • Cranks but does not start Gets more serious: stop and have it checked.

Compare with: Check engine light with loss of power

How to fix

  1. Have the battery tested and check the battery terminals are clean and tight.

  2. Ask a dealer whether your VIN has an open computer update for P2107.

Parts and cost context

  • Engine control module (ECM / PCM):The module is often part of the engine computer. Replacement usually needs programming at a dealer or shop. Labour varies; get a quote.

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

Compare used part prices on PartPriceGuide

On your vehicle

Mazda

  • 2004 · RX-8

    Supported by vehicle data

    Mazda special program MSP04 reflashes the PCM for P2107 with no start or lack of power. Whether it is still current is not verified.

  • 0102204Status unverified

    Special program MSP04: P2107, P2108, P2402 or P0420, PCM reflash

    2004rx-8 · NHTSA 10008057

    Reflash the powertrain control module for engine no start, lack of power and these codes.

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

Ford

  • 2004 · Explorer

    Supported by vehicle data

    Ford bulletin 17561 lists P2107 with P0606 and U0300 for a delayed crank on 2004 Explorers. Whether it is still current is not verified.

  • 2014–2016 · Transit Connect · 2.5L

    Supported by vehicle data

    Ford TSB 16-0163 lists P2107 among many codes on the 2.5L Transit Connect. The summary does not describe the repair. Whether it is still current is not verified.

  • 17561Status unverified

    Delayed crank, no start with U0300, P0606, P2105, P2107

    2004explorer · NHTSA 10008125

    Service information for the delayed crank with the MIL and wrench light on. The summary also covers the Mercury Mountaineer and does not give the repair.

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

  • 16-0163Status unverified

    Drivability issues with many DTCs including P2107

    2014–2016transit-connect · NHTSA 10094582

    Covers 2.5L Transit Connect vans that set many codes; follow the service procedure. The summary does not describe it.

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

  • P2110The engine computer has deliberately limited engine speed because of a fault it found in the electronic throttle system

    Same system Possible — needs testing

    P2110 is a throttle actuator limiting-performance fault; both come from the throttle control system and can set after a module or power fault.

  • P0606A control module found a fault in its own processor or programming

    Shares causes Supported by vehicle data

    P0606 (computer processor fault) is listed with P2107 in a 2004 Explorer bulletin, which points to the computer rather than the throttle.

  • P0562System voltage low

    Shares causes Supported by vehicle data

    P0562 (system voltage low) is listed with P2107 in a Ford no-throttle-response bulletin; check the battery and charging system first.

All Electronic throttle and accelerator pedal codes

P2107 questions

Is it safe to drive with P2107?

Be careful. The throttle may not respond or the engine may stall, which is dangerous in traffic. Get it checked soon.

Sources and review

  1. TSB 0004209 No throttle response with P2107, P2108 or P0562 — Ford Motor Company
  2. Mazda Special Program MSP04 P2107, P2108, P2402 or P0420, PCM reflash — Mazda North American Operations
  3. P2107 trouble code summary — TroubleCodes.net
  4. TSB 17561 Delayed crank, no start with U0300, P0606, P2105, P2107 — Ford Motor Company
  5. TSB 16-0163 Drivability issues and many DTCs including P2107, P025A, P0201-P0204 — Ford Motor Company
Last reviewed
Written by
Saurabh K.
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