P1224

What it means

P1224 on a Ford means the powertrain control module found Throttle Position Sensor B outside its expected range during the electronic throttle self-test. The module compares the sensor B signal with sensor A and the commanded throttle angle, and sets the code when the readings do not agree or fall outside the learned limits. Exact sensor layout and test conditions vary by model and engine.

Symptoms

• Engine warning light on
• Reduced engine power or limp-home mode
• Poor or erratic idle
• Hesitation or delayed response when pressing the accelerator
• Throttle warning light (wrench or similar symbol) displayed on some models
• Engine stalling or difficulty starting

Possible causes

• Dirty or carbon-fouled throttle body causing the plate to stick or move unevenlylikely
• Faulty throttle position sensor B or failing throttle body assembly (sensor usually integrated)likely
• Damaged wiring, poor connector contact or corrosion in the throttle sensor circuitpossible
• Voltage reference or ground fault affecting the sensor circuitpossible
• Low or unstable battery voltage or charging system fault upsetting the self-testpossible
• Fault inside the powertrain control modulerare

How to diagnose

1. Read all stored and pending codes and note the freeze frame data, then check for any related throttle or accelerator pedal codes.
2. Check battery condition and charging voltage, as low voltage can upset throttle self-tests.
3. Visually inspect the throttle body connector and wiring for damage, chafing, corrosion, bent pins or water ingress.
4. Inspect the throttle body bore and plate for carbon build-up, and check the plate moves smoothly by hand with the ignition off, following model-specific guidance.
5. With a scan tool, compare live data for throttle position sensors A and B while slowly operating the pedal, looking for mismatch, dropouts or jumps.
6. Check the sensor reference voltage, signal and ground circuits with a multimeter against the manufacturer's wiring diagram for your model.
7. Check for any technical service information or calibration updates applicable to your vehicle and engine.
8. Clear the code and road test or repeat the self-test to see if it returns.

How to fix

• Clean the throttle body using a method approved for your model, then complete any required throttle relearn procedure.
• Replace the throttle body assembly if sensor B or the throttle motor is faulty, then perform the relearn.
• Repair or replace damaged wiring and clean or renew faulty connector terminals.
• Correct reference voltage or ground faults found in the circuit.
• Repair the battery or charging fault if voltage is outside specification.
• Replace or reprogram the powertrain control module only if testing confirms a fault or an applicable updated calibration exists.

Can I keep driving?

This code for other makes

• P1224JaguarElectronic Throttle Control Position Error
• P1224LincolnThrottle Position Sensor B Out of Self-Test Range
• P1224MercuryThrottle Position Sensor B Out of Self-Test Range
• P1224OtherThrottle Position Sensor B Out Of Self Test Range

Nearby codes

• P1223FordPedal Demand Sensor B Circuit High Input
• P1227FordWastegate Failed Closed Over Pressure