Need a P2104 diagnosis? Trust our experts.
Oops! We got lost!
Your location cannot be detected. Please enter your zipcode for nearby shops.
P2104 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
The electronic throttle control system (ETCS) controls the throttle valve opening. When the driver presses the accelerator pedal, the Accelerator Pedal Position Sensor (APP) sends a signal to the engine's control module (PCM) telling the PCM how much power the driver is requesting from the engine. The PCM then commands the throttle plate to open accordingly. If the PCM detects that the throttle is not opening correctly in proportion to the signal received from the APP Sensor, the PCM will set code P2104. The PCM may also put the engine into "limp home mode", limiting the available power from the engine to prevent unwanted acceleration.
RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.
Call us at 877-913-1554
Available 9am – 6pm ET Monday through Friday
OBD-II Code P2104 is defined as a Throttle Actuator Control System - Forced Idle
The electronic throttle control system (ETCS) controls the throttle valve opening. When the driver presses the accelerator pedal, the Accelerator Pedal Position Sensor (APP) sends a signal to the engine's control module (PCM) telling the PCM how much power the driver is requesting from the engine. The PCM then commands the throttle plate to open accordingly. If the PCM detects that the throttle is not opening correctly in proportion to the signal received from the APP Sensor, the PCM will set code P2104. The PCM may also put the engine into "limp home mode", limiting the available power from the engine to prevent unwanted acceleration.