AutoCodes – Buick – P0041 Buick

P0041 Buick Code - Oxygen Sensor Signal Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2

Quick Answer

The heated oxygen sensor (HO2S) monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. Common causes include Crossed HO2S harness connectors, Crossed HO2S wiring at the harness connectors, Crossed HO2S wiring at the PCM connectors. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0041 Buick indicates Oxygen Sensor Signal Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2.
Common causes: Common causes include Crossed HO2S harness connectors, Crossed HO2S wiring at the harness connectors, Crossed HO2S wiring at the PCM connectors.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 470

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 19, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0041 Buick 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.

OBDII Code P0041 Buick - Oxygen Sensor Signal Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2 - AutoCodes.com — P0041 Buick Code - Oxygen Sensor Signal Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0041 Buick?

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)

How to Fix the DTC P0041 Buick?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0041 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.