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

- Code Popularity: 31,078 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0040?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Crossed Universal HO2S harness connectors
  • Crossed Universal HO2S wiring at the harness connectors
  • Crossed Universal HO2S wiring at the Powertrain Control Module (PCM) connectors
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How to Fix the DTC P0040?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0040 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P0040 Description

The Heated Oxygen Sensor (HO2S) monitor determines if the Universal HO2S signal response for a fuel shift corresponds to the correct engine bank. This Diagnostic Trouble Code (DTC) is set when there is no response from the Universal HO2S being tested.

OBDII Code P0040 - Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1 - AutoCodes.com
P0040 Code - Oxygen Sensor Signal Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1

Need More Information on the Code?

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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

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Code P0040 comments

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