P2100 OBD Error Code

Does the vehicle’s check engine light come on on the dashboard? Are you experiencing poor throttle response with a stalled and hesitant engine? Is there a visible effect on the vehicle’s fuel economy?


These are all direct indications of a problematic throttle actuator which can lead to OBD code P2100 which is stored in the powertrain control module, which can even cause the vehicle to enter safety mode.

Learn more about OBD error code P2100

He Accelerator Pedal Position (APP) Sensor informs the Powertrain Control Module about the power requested by the vehicle. This information is transmitted to the Electronic Throttle Control System (ETCS) which controls the opening of the valve.

Reads: Error Code P1130 – Air/Fuel Ratio Sensor Range/Malfunction Bank 1 Sensor 1 (Toyota, Lexus)

If he PCM detects that the throttle place is not opening properly and the motor circuit is open, it will set the OBD code P2100 in the system.

What causes this problem with the Open Throttle Actuator Control Motor Circuit?

  • Open-Throttle Actuator Circuit
  • Throttle control system failure
  • Defective Accelerator Pedal Position Sensor
  • PCM failures
  • Wiring and connector problems

Replace/repair these parts to fix the P2100 code

  • Engine Control Module – It is not always the components, but the ECM that can also be defective. It can cause misinterpretation of correct data, leading to erroneous operating decisions that will affect the transmission and overall engine performance. Therefore, replace the faulty module and reprogram it now!
  • Powertrain control module – The powertrain control module can also be faulty in rare cases and therefore needs to be checked through system and software errors. Therefore, check and replace it, if necessary.
  • Diagnostic tools – It is always advisable to use the correct tools and equipment while solving any OBD code problem, as even small errors can lead to wrong diagnosis. Therefore, always take the help of a professional who has the knowledge and experience of such tools efficiently.
  • Throttle position sensor – A faulty throttle position sensor can cause vehicle shaking and jerking. It can also cause sudden surges of idling and the engine stalling for no reason. So, replace your faulty throttle position sensor now!
  • throttle actuator connector – If the throttle actuator connector is defective, it may cause the accelerator pedal to not open in time and cause improper throttle response and slow acceleration. Therefore, replace it now!
  • Throttle control relay – The throttle control relay may also be faulty, causing poor throttle response and rough idling. It can also lead to hesitation during acceleration and deceleration. Therefore, replace the faulty throttle control relay.
  • Accelerator pedal sensor – The accelerator pedal sensor is used to transmit information to the throttle control system to control the opening and closing of the throttle plates. If the pedal sensor is defective, the PCM will not be able to interpret the driver’s request, thus making it difficult to respond to the throttle. Replace the faulty sensor now!

Symptoms of OBD error code P2100

It is essential to know the symptoms of a problem, as only then would you be able to solve the problem. So that’s why we have listed some of the main symptoms of OBD Code P2100 here:

Common symptoms:

  • Engine light on
  • Slow acceleration
  • Rough engine idling
  • Delayed throttle response

How to Fix P2100 Throttle Actuator An Open Engine Control Circuit

Here are some ways with the help of which you will be able to correct the OBD code P2100.

  • Throttle Actuator Assembly Replacement
  • Accelerator Pedal Position Sensor Replacement
  • Throttle position sensor replacement
  • Throttle control system repair
  • Powertrain Control Module Repair and Reprogramming

Vehicles that frequently display the OBD code P2100

P2100 Acura OBD Error Code P2100 Honda OBD Error Code P2100 Mitsubishi OBD Error Code
P2100 Audi OBD Error Code P2100 Hyundai OBD Error Code P2100 Nissan OBD Error Code
P2100 BMW OBD Error Code P2100 Infiniti OBD Error Code P2100 Porsche OBD Error Code
P2100 Buick OBD Error Code P2100 Jaguar OBD Error Code P2100 Saab OBD Error Code
P2100 Cadillac OBD Error Code P2100 Jeep OBD Error Code P2100 Scion OBD Error Code
P2100 Chevrolet OBD Error Code P2100 Kia OBD Error Code P2100 Subaru OBD Error Code
P2100 Chrysler OBD Error Code P2100 Lexus OBD Error Code P2100 Toyota OBD Error Code
P2100 Dodge OBD Error Code P2100 Lincoln OBD Error Code P2100 Vauxhall OBD Error Code
P2100 Ford OBD Error Code P2100 Mazda OBD Error Code P2100 Volkswagen OBD Error Code
P2100 GMC OBD Error Code P2100 Mercedes OBD Error Code P2100 Volvo OBD Error Code

Easy Diagnosis of Engine Error OBD Code P2100

Here are some steps you need to follow to diagnose this P2100 fault code:

  • First, check the technical service bulletins (TSB) for the particular make and model of the vehicle. This issue may be a known issue with a known solution published by the manufacturer and can save time and money during diagnosis.
  • Next, locate the Throttle Actuator A (TA-A). This actuator is usually mounted at the front of the engine, on top of the engine, inside the wheel wells, or against the bulkhead.
  • Visually inspect the connector and wiring for scratches, scuffs, bare wires, burn spots, or melted plastic. Carefully check the connector terminals to see if they are burned or have a green tint that indicates corrosion.
  • Use a scan tool to erase diagnostic trouble codes from memory and see if the code P2100 came back. If it doesn’t, chances are the connections are your problem.
  • Test the actuator and related circuits. Check the resistance specifications for the particular make and model. If the actuator motor is open or shorted, replace the Throttle Actuator.
  • With the help of a DVOM, make sure there are 12V in the Throttle Actuator power circuit.
  • Check if the PCM is defective and repair and reprogram it if necessary.

Common errors when diagnosing the P2100 code

  • Failure to clear ECM codes after fixing the problem
  • Not checking the wiring and connectors properly
  • PCM and system failures

If you want to know other articles similar to P2100 OBD Error Code – Throttle Actuator Control Motor Circuit A Open you can visit the category Fault Codes.


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