Fault code P1586 – a step-by-step guide to diagnosing and fixing it

Error code P1586 is displayed and the check engine light is on - what does this mean?

The DTC P1586 is a manufacturer-specific fault code that is recognized by the OBD system and indicates a problem with the engine control unit or electronic components. This trouble code mainly occurs in Ford vehicles and usually refers to problems with the electronic throttle actuator or the engine control unit. Depending on the vehicle manufacturer, the exact definition of this EOBD code may vary.

What can cause this error code?

• Defective electronic throttle actuator
• Damaged wiring harness to the throttle position sensor
• Loose or corroded plug connections
• Faulty engine control unit (ECU)
• Defective accelerator pedal sensor
• Dirty or blocked throttle body
• Power supply problems in the electronic system
• Software error in the engine control unit

What symptoms occur in parallel with fault code P1586?

• Irregular idling: The engine runs unevenly or fluctuates in speed
• Reduced engine power: Noticeable loss of power when accelerating
• Starting problems: The vehicle is difficult to start or does not start
• Jerky ride: Uneven driving behavior, especially at low speeds
• Emergency running program: The vehicle switches to safety mode with limited power
• Increased fuel consumption: Significantly higher consumption than usual

How to fix the problem of fault code P1586?

• Repairing fault code P1586 requires a systematic diagnosis of the affected components.
• Clean the throttle body: Remove the throttle body and clean it thoroughly with a special cleaner to remove deposits and dirt
• Check and clean plug connections: Check all electrical connections to the throttle actuator for corrosion or loose contacts and clean them if necessary
• Replace the throttle actuator: Replace the complete electronic throttle actuator if cleaning is not sufficient or the component is defective
• Repair wiring harness: Check the entire wiring harness for damage, breaks or shorts and repair or replace damaged sections
• Reprogram motor control unit: Perform a reprogramming or software update of the ECU to correct any software errors
• Calibrate accelerator pedal sensor: Recalibrate or replace the accelerator pedal sensor if it is sending faulty signals