[SOLVED] Ford B1240 Code: Quick Fix For Start Button Circuit Short

The OBD code B1240 for Ford indicates an issue with the Start/Stop Switch Indicator circuit.

Symptoms include the Engine Light being ON.

This code is typically caused by a faulty Start/Stop Switch Indicator or related wiring issues.

While not a critical problem, it should be addressed promptly.

To fix it, inspect the wiring harness and connectors for any damage or poor connections.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

The Ford B1240 fault code indicates a problem with the air flow blend door.

  • Symptoms: Service Engine Soon Warning Light may illuminate.
  • HVAC system may not respond to inputs.
  • HVAC system may blow air at the wrong temperature.
  • HVAC system may not blow air at all.

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Possible triggers for Ford B1240 include faulty air temperature blend control actuator or wiring issues.

  • B1240 can be caused by a faulty Start/Stop Switch Indicator.
  • A Start/Stop Switch Indicator harness that is open or shorted.
  • A Start/Stop Switch Indicator circuit with poor electrical connection.
  • A faulty Body Control Module (BCM).

Address the issue by inspecting the air temperature blend door actuator for proper operation.

  • To fix Ford OBDII code B1240, start by reviewing the possible causes and visually examining the wiring harness and connectors related to the code.
  • Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
  • If no issues are found with the wiring and connectors, proceed to test the circuit for proper voltage and continuity.
  • Replace the faulty component if necessary.
  • Perform a module reset or reprogramming if recommended by the diagnostic procedure.
  • Clear the fault code and test drive the vehicle to ensure the issue has been resolved.

Diagnosing and repairing Ford B1240 may involve checking and replacing faulty air conditioning blend door actuator.

The cost to diagnose and fix Ford OBD code B1240 typically ranges from $75 to $150, based on an estimated repair time of 1. 0 hour.

Factors like shop rates and complexity of the repair can influence the final cost.

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Ford B1240 indicates a fault with the air flow blend door driver circuit.

OBD code B1240 for Ford vehicles indicates an error with the climate control air inlet door driver circuit.

This code is triggered by the HVAC module when it detects a fault in the circuit responsible for controlling the air inlet door actuator.

The air inlet door actuator is a component of the HVAC system that controls the flow of air into the vehicle’s cabin from either the outside or recirculation mode.

When this circuit malfunctions, it can lead to issues with controlling the airflow direction and temperature inside the vehicle.

Detailed information on Ford B1240 code, including symptoms, causes, and solutions for effective troubleshooting.

To diagnose OBDII code B1240 in a Ford vehicle, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.

Verify TCM communication over the Controller Area Network (CAN) using a scan tool.

If the TCM does not respond, reprogramming or reflashing may be necessary.

Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of corrosion, bending, or breakage.

This thorough inspection will help identify and address any issues causing the B1240 trouble code.

1. What does OBD code B1240 indicate in a Ford vehicle?

OBD code B1240 in a Ford indicates an issue with the Start/Stop Switch Indicator circuit. Check wiring harness, connectors, and BCM for faults.

2. What are the common symptoms associated with B1240 in a Ford car?

Common symptoms of B1240 in a Ford car include the Engine Light ON and possible issues with the Start/Stop Switch Indicator circuit or Body Control Module.

3. How can I diagnose and fix OBD code B1240 in my Ford vehicle?

Diagnose OBD code B1240 in Ford: Symptoms Engine Light ON. Causes Faulty Start/Stop Switch Indicator, harness issues, BCM. Fix Inspect wiring, connectors for damage.

Ford b1240 error fault code explained

If your Ford is displaying OBD code B1240 and your airbag warning light is illuminated, it may indicate a fault in the airbag system’s sensor circuit.

This could be caused by a malfunctioning airbag control module, damaged wiring, or a faulty airbag impact sensor.

To address Ford OBD code B1240, start by inspecting the wiring harness and connectors related to the airbag system.

Check for any visible damage, corrosion, or loose connections.

Test the airbag impact sensor and the airbag control module for proper functionality.

Replace any components that are found to be

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