P2107 — Throttle Actuator Control Module Processor #

Note: The code description may vary depending on the vehicle manufacturer (OEM). Variations in the wording are common and reflect specific brand terminology.

• P2107 — Throttle Actuator Control Module Processor (Generic/Multiple OEMs)
• P2107 — Throttle Actuator Control Module Processor Malfunction (Ford, Mazda, Hyundai, Kia)
• P2107 — Throttle Actuator Control Module Processor Error (Toyota, Lexus, Honda, Nissan)

Summary of the P2107 Code #

P2107 signals a detected malfunction in the Throttle Actuator Control (TAC) Module Processor. The TAC module is the computer responsible for controlling the electronic throttle body, which regulates the amount of air entering the engine as you press the accelerator. When the Engine Control Module (ECM) or Powertrain Control Module (PCM) finds an abnormality or internal error in the TAC processor, it triggers this code. This fault can result in poor throttle response, reduced engine performance, or even limp mode. Addressing this code promptly is critical for driveability and safety.

Common Symptoms for P2107 #

When the P2107 code appears, your vehicle may exhibit a range of signs that can disrupt normal driving. These symptoms may be subtle at first but often become more pronounced over time. Recognizing these early helps with quicker diagnosis and repair.

• Check Engine Light illuminated
• Reduced engine power (limp mode)
• Unresponsive or delayed throttle response
• Rough idling or stalling at stops
• Poor acceleration or hesitation
• Inconsistent engine speed, especially at idle

Most Likely Causes for P2107 #

The P2107 code can arise from a handful of root causes, generally related to failures in the throttle actuator system or its supporting electronics. Some reasons are more common than others, and understanding their frequency helps prioritize diagnostic efforts.

1. Internal failure of the Throttle Actuator Control (TAC) module processor
2. Damaged or corroded wiring/connectors at the throttle body or control module
3. Faulty electronic throttle body (ETB) assembly
4. Issues with the vehicle’s main Engine Control Module (ECM/PCM)
5. Low battery voltage or charging system problems

Step-By-Step Diagnostic for P2107 #

Diagnosing P2107 requires a systematic approach to isolate the root cause. Following a logical sequence helps avoid unnecessary parts replacement and ensures safety.

• Read all stored codes and freeze frame data using a professional scan tool.
• Visually inspect the throttle body, wiring harness, and connectors for signs of damage, corrosion, or loose connections.
• Check battery voltage and charging system function to rule out low voltage issues.
• Test the throttle actuator control circuit for proper voltage and ground at the connector.
• Perform a throttle body actuation test via the scan tool (if supported) to verify movement and response.
• If wiring and power supply are correct, consider swapping in a known-good throttle body or TAC module (if available).
• Re-flash or update the ECM/PCM software if recommended by the OEM.
• If the problem persists, further diagnose for possible ECM/PCM faults.

Possible Repairs for P2107 #

Once the diagnosis is complete, addressing the underlying cause will often resolve the code. The following repairs correspond directly to the most common problems found.

• Replace the Throttle Actuator Control (TAC) module if processor failure is confirmed.
• Repair or replace damaged/corroded wiring and connectors at the throttle body or module.
• Replace the electronic throttle body assembly if it is faulty.
• Update or reprogram the ECM/PCM software if an OEM bulletin applies.
• Repair or replace the vehicle’s main ECM/PCM as a last resort.
• Address any charging system or low battery voltage issues.

Is It Safe to Drive with Code P2107? #

Limited: While some vehicles may limp along with reduced power, it is not advisable to drive for extended periods with the P2107 code active. The loss of throttle control can create unpredictable engine behavior, loss of power, or stalling, which could become hazardous—especially in traffic or on highways. Prompt attention is recommended to avoid safety risks and further damage.

Vehicles Most Commonly Affected by P2107 #

P2107 is seen across a broad range of makes and models, but is especially prevalent in vehicles using electronic throttle systems from the early 2000s onward. The following brands and models are known to experience this code more frequently:

• Ford (Fusion, F-150, Focus, Escape)
• Mazda (3, 6, CX-7, CX-9)
• Hyundai (Sonata, Elantra, Santa Fe)
• Kia (Optima, Sorento, Sportage)
• Toyota (Camry, Corolla, RAV4)
• Lexus (ES, RX, IS series)
• Honda (Accord, Civic, CR-V)
• Nissan (Altima, Sentra, Rogue)

Common Mistakes & Best Practices for P2107 #

Misdiagnosis is not uncommon with P2107 due to the complexity of modern electronic throttle systems. Avoiding common pitfalls saves time and money, while best practices ensure a thorough and safe repair.

• Don’t replace the throttle body without first inspecting wiring and connections—many “bad” throttle bodies are actually the result of simple wiring faults.
• Avoid clearing the code before documenting freeze frame data, as this information is invaluable for pinpointing intermittent faults.
• Never overlook battery and charging system condition; low voltage can trigger processor-related codes.
• Always follow OEM diagnostic flowcharts and service bulletins for your specific vehicle.
• After any repair, perform a throttle body relearn procedure if required by the manufacturer.

Quick FAQ for P2107 #

Below are answers to some of the most frequent questions drivers and technicians have about the P2107 code.

• Q: Can a dirty throttle body trigger P2107?
  A: Rarely. P2107 is typically caused by electronic or processor faults, not physical dirt or carbon. However, severe contamination could indirectly affect electronic components.
• Q: Will disconnecting the battery clear the P2107 code?
  A: It may clear the code temporarily, but if the underlying issue isn’t resolved, the code will return as soon as the system detects the fault again.