For Shop Owners

P0040 - Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • 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)
What does this mean?

Possible symptoms

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

P0040 Description

The heated oxygen sensor (HO2S) monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank.
OBDII Code P0040 - Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1 - itimaster.ru

P0040 Information for specific makes

P0040 AUDI HO2S Bank 1 and 2 Sensor 1 Signal Wires Swapped
P0040 BMW O2 Sensor Signal Wires Swapped- HO2S11 with HO2S21
P0040 CHRYSLER 1/1 And 2/1 O2 Sensor Harness Connectors Reversed
P0040 DODGE 1/1 And 2/1 O2 Sensor Harness Connectors Reversed
P0040 FORD Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1
P0040 JEEP 1/1 And 2/1 O2 Sensor Harness Connectors Reversed
P0040 LINCOLN Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1
P0040 MAZDA HO2S11 Fuel Shift correction Fault
P0040 MERCURY Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1
P0040 MINI O2 Sensor Signal Wires Swapped- HO2S11 with HO2S21
P0040 VOLKSWAGEN HO2S Bank 1 and 2 Sensor 1 Signal Wires Swapped

Need more help?

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P0040 Comments

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Any information is appreciated. Thanks
Repair Importance Level: 2
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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