Engine-Codes - Mercury - B1239 MERCURY

B1239 MERCURY Code - Airflow Blend Door Driver Circuit Failure

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

|B1239 MERCURY code possible causes

  • Faulty Auxiliary Air Inlet Mode Door Actuator
  • Auxiliary Air Inlet Mode Door Actuator harness is open or shorted
  • Auxiliary Air Inlet Mode Door Actuator circuit poor electrical connection
  • Faulty Traction Battery Control Module (TBCM)

|How is the B1239 MERCURY code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the B1239 MERCURY code

Labor: 1.0

The cost to diagnose the B1239 MERCURY code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1239 MERCURY code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is B1239 MERCURY code meaning?

When the outside ambient air temperature is cool enough to provide adequate high-voltage battery cooling, the Traction Battery Control Module (TBCM) positions the auxiliary air inlet door actuator in the OPEN position. If the outside ambient air temperature is too warm to provide adequate High Voltage Traction Battery (HVTB) cooling, the TBCM positions the auxiliary air inlet door actuator in the CLOSED position and requests A/C cooling. The TBCM sends and receives signals to the auxiliary air inlet door actuator on circuits, indicating the position of the auxiliary air inlet door. The TBCM controls the movement of the door by controlling power and ground to the auxiliary air inlet door actuator through circuits.

|Need more information with the B1239 MERCURY code?

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|Need help with a B1239 MERCURY code?

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