The P2106 code on your 2022 Nissan Altima indicates the throttle actuator control system is stuck in the closed position. This code affects your Altima's 2.5L 4-cylinder or 2.0L Variable Compression Turbo engine's electronic throttle, signaling the throttle plate is not opening when commanded by the PCM.
Understanding P2106 on Altima
The electronic throttle body must be able to move freely from closed to fully open position in response to accelerator pedal input. Code P2106 sets when the PCM commands the throttle to open but the throttle position sensor indicates it remains closed, suggesting mechanical binding or motor failure preventing opening.
Common Symptoms
- Check engine light on
- Engine idles but won't accelerate
- Vehicle undriveable or very slow
- Reduced engine power mode
- Throttle completely unresponsive
- May idle roughly if throttle slightly open
- Possible engine stall
Primary Causes
- Throttle body motor failure
- Carbon buildup preventing throttle plate movement
- Broken throttle plate return spring
- Debris jamming throttle plate
- Throttle body internal damage
- Ice formation in throttle body (cold weather)
- Wiring or connector fault preventing motor operation
Diagnostic Procedure for 2022 Altima
With key off, manually check if the throttle plate moves freely by opening it with a finger (with engine off and key out). Resistance or binding indicates mechanical issue. Check for carbon buildup around throttle plate edges. Monitor throttle motor current draw when commanded - high current with no movement indicates mechanical binding. Check for debris or ice blocking the throttle plate. Test motor operation with external power source.
Repair Solutions
If carbon buildup is the cause, carefully clean the throttle body with approved cleaner while avoiding electrical components. Remove any debris blocking the plate. If the throttle plate or motor is damaged, throttle body replacement is required. For ice-related issues, allow engine compartment to warm and avoid extended cold soaking. After cleaning or replacement, perform throttle relearn procedure.