Engine-Codes - Mini - P0040 MINI

P0040 MINI Code - O2 Sensor Signal Wires Swapped- HO2S11 with HO2S21

- Code Popularity: 1,686 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code P0040 MINI?

  • HO2S11 and HO2S21 sensors harness is open or shorted
  • HO2S11 and HO2S21 sensors circuit connectors (wrong connection)
  • Faulty Engine Control Module (ECM)

|How to Fix the P0040 MINI Code?

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 Code P0040 MINI?

Labor: 1.0

The cost to diagnose the P0040 MINI 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.

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|What are Code P0040 MINI Possible Symptoms?

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

|What Does the P0040 MINI Code Mean?

The heated oxygen sensor (HO2S) monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank.

O2 Sensor Signal Wires Swapped- HO2S11 with HO2S21

|Need more Information on the P0040 MINI Code?

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|Need Help with the P0040 MINI Code?

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