P0040 2011 FORD FUSION - Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3

P0040 2011 FORD FUSION Causes

  • Crossed HO2S harness connectors
  • Crossed HO2S wiring at the harness connectors
  • Crossed HO2S wiring at the PCM connectors
  • Bank 1 Sensor 1 / Bank 2 Sensor 1 harness is open or shorted
  • Bank 1 Sensor 1 / Bank 2 Sensor 1 circuit connectors (wrong connection)
  • Faulty Engine Control Module (ECM)
  • P0040 2011 FORD FUSION Notes

    The oxygen sensor connector might be connected incorrectly.

    First diagnose P0040 2011 FORD FUSION code

      Check 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 terminals.

    Cost of diagnosing the P0040 2011 FORD FUSION code

      Labor: 1.0

      The cost of diagnosing the P0040 2011 FORD FUSION code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

    P0040 2011 FORD FUSION Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • P0040 2011 FORD FUSION More Information

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    P0040 2011 FORD FUSION Description

    The heated oxygen sensor (HO2S) monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. The test fails when there is no response from the HO2S being tested.