P2111 - P2111 - THROTTLE ACTUATOR CONTROL SYSTEM STUCK OPEN

POST UPDATED IN April, 2021

Description of DTC code P2111 Generic

The fault code P2111 OBDII means that the car’s computer found a problem in the operation of the Throttle Actuator Control (TAC) system.

The TAC system is controlled by the Powertrain Control Module (PCM) through the Throttle Position Sensor (TPS). This is important because the proper functioning of the throttle body depends largely on the location of the throttle plate, which is controlled by one or more throttle actuator control motors. Besides, the PCM checks the TPS sensor to control how fast the driver wants to go, and then it determines the appropriate throttle response. To accomplish this, the PCM relies on a varying current flow concerning the throttle actuator control motor that moves the throttle plate to the required position.

Symptoms of fault code P2111 Generic

  • The Check Engine light turns on.
  • The motor may fail to start.
  • The accelerator may not respond at all.
  • Higher fuel consumption.
  • An excessive amount of smoke is expelled from the exhaust.

Causes of OBD2 P2111 Generic

The reasons for setting DTC P2111 OBD2 are:

  • The throttle body may be damaged.
  • Perhaps the throttle plate or its linkage is dirty.
  • The Throttle Position Sensor (TPS) may be defective.
  • A throttle actuator controller motor may be in poor condition.
  • Associated circuit connectors or wires with damage.

Possible solutions of the DTC code P2111 Generic

To troubleshoot problems related to the P2111 OBDII diagnostic code, you can do this:

  • Check the TSBs (Technical Service Bulletins).
  • Inspect the Throttle Actuator Control system components. This includes cables and connectors, the throttle body, the Throttle Position Sensor, and the throttle actuator control motor. Repair or replace any possible damage to these. Replace the TPS Sensor if necessary.
  • With the ignition switch in the off position, unplug the throttle body connector and locate the two pins that connect the motor to the throttle body. Then, use an ohmmeter to check the resistance of the motor. You should get a reading between 2 and 25 ohms. Compare the result with that specified by the manufacturer. Excessive out-of-range resistance requires replacement of the throttle body.
  • Check wires for continuity. Repair or replace.

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