P241C

Code

Generic P — Powertrain

Throttle Actuator Control System - Ice Blockage Bank 2

Brand: Generic

Type: P — Powertrain

Views: UK: 20 EN: 36 RU: 21

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Ice or frost inside throttle body or intake tract on bank 2 restricting plate movement
Failed or degraded throttle body heater/anti-icing element (if equipped)
Heavy carbon build-up or debris mimicking a restriction
Throttle actuator motor or gear binding
Wiring harness or connector open/short to throttle actuator or sensors
Faulty throttle position sensor or incorrect sensor readings

Symptoms

Check Engine Light (MIL) illuminated
Reduced engine power or limp-home mode
Poor or fluctuating idle, stalling at idle
Delayed or limited throttle response
Fault present primarily in cold/humid ambient conditions
Possible stored freeze-frame data showing low intake temperatures

What to check

Read and record freeze-frame and PID data with a capable scan tool (commanded vs actual throttle, actuator current, IAT, MAF/MAP, pedal position)
Check for other related codes (throttle actuator, TPS, MAF, IAT)
Visual inspection of intake tract, throttle body and inlet ducts on bank 2 for ice, frost or physical obstructions
Verify proper operation of throttle body heater/anti-icing element (if equipped) and its wiring
Perform actuator motor current and voltage checks while commanding throttle plate through a scan tool
Inspect connectors and wiring to throttle actuator and sensors for corrosion, water intrusion or damage

Signal parameters

Commanded Throttle Plate Angle / Position (degrees or %)
Actual Throttle Plate Position (TPS) — compare to commanded
Throttle Actuator Motor Current (A) and Supply Voltage (V)
MAF (g/s) or MAP (kPa) and calculated load
Intake Air Temperature (IAT) and Ambient Air Temperature (°C)
Accelerator Pedal Position (APP) sensor A/B correlation

Diagnostic algorithm

Connect a scan tool and record stored freeze-frame and PIDs. Note ambient and intake temperatures and commanded vs actual throttle position when fault set.
If conditions are cold/humid and ice is suspected, perform a visual inspection of the intake and throttle body on bank 2 for ice/frost. If ice is present, allow controlled defrosting (warm air) and do not use open flame or high-temperature sources.
With scan tool, command the throttle plate through its range and observe actual position and actuator current. Excessive current or limited movement suggests mechanical restriction or motor/gear issue.
Verify operation of any throttle body heater/anti-icing element and check its power/ground/continuity. Replace or repair if inoperative.
Inspect and test wiring/connectors for continuity, shorts to battery/ground, corrosion or water intrusion. Wiggle-test harness while monitoring PIDs for intermittent faults.
Check IAT and ambient temperature sensors for plausibility and correct readings; replace if erroneous and impacting control logic.
If no ice and mechanical binding suspected, remove and inspect throttle body for carbon or debris. Clean per manufacturer procedure or replace if damaged or heater integrated and failed.
Clear codes and perform a road or cold-start test under similar environmental conditions to confirm repair. If fault persists, escalate to controller/ECM diagnostics or replace throttle body assembly as directed by service information.

Likely causes

Ice accumulation in the throttle body or intake elbow on bank 2 (most likely in cold, humid conditions)
Damaged or inoperative throttle body heater or anti-ice system
Mechanical binding of the throttle actuator or plate due to contamination
Electrical fault in throttle actuator motor circuit (power, ground, PWM) or TPS correlation error
Incorrect IAT/ambient temperature sensor reading causing false ice detection

Fault status

⚠️ Status

Throttle actuator control detected restricted movement or airflow on bank 2 consistent with ice blockage; control may invoke limp mode. Freeze-frame and PID data stored.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours