Code Severity and Symptoms
The severity of this code can range from moderate to severe depending on the specific malfunction. Symptoms of a P2104 trouble code may include:
- Engine does not start
- Little or no throttle response
- Check engine light illuminated
- ABS light illuminated
- Automatic transmission won’t shift
- Additional codes present
Common Causes of This DTC Code
The most common situations that set this code and put the engine in fail-safe or limp mode to indicate a problem and act as a red flag are:
- Engine overheating
- Coolant leaks
- EGR valve malfunction
- Mass airflow sensor malfunction
- Engine axle modifications
- ABS, traction control, or stability control failures
- Automatic transmission problems
- Abnormal system voltages
What Are Common Repairs?
- Repair coolant leak
- Replace or clean ABS sensor
- Replace or clean EGR valve
- Replace or clean mass airflow sensor
- Clean connector corrosion
- Repair or replace wiring
- Replacing PCM
Diagnostic and Repair Procedures
The first step in troubleshooting any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and powertrain. In some circumstances, this can save you considerable time in the long run by pointing you in the right direction.
The second step for this code is to perform a PCM scan to identify other trouble codes. This code is an informational code and in most cases its function is to alert a driver that the PCM has initiated a fail-safe mode due to a malfunction or failure in a system not directly related to the throttle actuator control.
If other codes are identified, you should check TSBs related to the specific vehicle and that code. If a TSB hasn’t been issued, you should follow the specific troubleshooting steps for that code to identify the source of the malfunction detected by the PCM that caused the engine to enter fail-safe or limp mode.
Once all other codes have been cleared or if no other codes are detected, if the throttle actuator control code still exists, the PCM and throttle actuator must be evaluated. All wiring and connections should be visually inspected for obvious defects as a starting point.
Common Mistake
Replacing the throttle actuator or PCM when other malfunctions are setting this code.
Rare Repair
Replacing the throttle actuator control
I hope the information in this article has been helpful in pointing you in the right direction to fix the issue with your throttle actuator control system force code. This article is strictly informational and specific vehicle technical data and service bulletins should always take priority.