Throttle Actuator Control System - Forced Limited Power
P2106 indicates that the Powertrain Control Module (PCM) has detected a fault in the throttle actuator control system and has entered a failsafe mode, limiting engine power to prevent damage. This is often triggered by a malfunctioning throttle body, faulty accelerator pedal position sensor, or wiring issues. The PCM commands reduced throttle opening, resulting in a noticeable loss of power and a 'limp mode' condition.
01. Most Common Causes
- Faulty throttle body (sticking or failed motor)
- Wiring or connector issues in the throttle actuator circuit
- Malfunctioning accelerator pedal position sensor
- PCM software or hardware failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power (limp mode)
- Poor acceleration or hesitation
- Engine may not exceed 2000-3000 RPM
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes to pinpoint the issue.
Step 2: Inspect throttle body for carbon buildup or mechanical binding.
Step 3: Test throttle actuator motor and position sensor circuits with a multimeter.
Step 4: Check accelerator pedal position sensor voltage and wiring.
Step 5: Perform a throttle body relearn procedure after repairs.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the vehicle may have limited power and could stall. Seek repair immediately.
How much does it cost to fix?▼
Costs range from $150 to $400 depending on the cause; throttle body replacement is typically $200-$350 plus labor.