P0041 OBD-II Trouble Code: O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0041 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0041 code

P0041 is a diagnostic trouble code (DTC) for "O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0041 DIAGNOSTIC Get a fair and transparent estimate upfront

P0041 code definition

P0041 tells us the ECU has detected swapped sensor signals for oxygen sensor 2 between banks 1 and 2. This code may be associated with P0040.

What the P0041 code means

P0041 means that the engine control unit (ECU) is seeing the signals for oxygen sensor 2 has switched between the left and right banks. The bank 1 sensor 2 signal is swapped with bank 2 sensor 2 causing the ECU to trigger a Check Engine Light on the dash.

What causes the P0041 code?

P0041 has a few common causes:

  • Swapped connectors between oxygen sensor 2 left and right bank
  • May indicate ECU failure or error
  • Wiring damaged, open, or shorted
  • Swapped oxygen sensor wiring between banks

Generally this code is a result of oxygen sensor replacement or repair and the connectors have been swapped.

What are the symptoms of the P0041 code?

The first symptom of P0041 is the ECU reading improper signals for bank 1 and 2 sensor 2. This causes a Check Engine Light to be displayed including a possible flashing Check Engine Light. After the code is displayed the ECU may put the car into a limp mode to prevent damage to the vehicle. Drivability issues such as poor vehicle fuel economy, engine stalling, loss of engine power, and poor running may all occur once the code is enabled.

How does a mechanic diagnose the P0041 code?

There are a few simple steps that must be taken when diagnosing P0041:

  • A qualified technician will hook up a scan tool to the vehicle's OBD-II port to confirm P0041 is the code present.

  • The freeze frame data will be observed for P0041 to see what conditions, such as vehicle speed, operating temperature, engine speed, and operating time the code was detected in, so that these conditions can be recreated on a road test.

  • A road test will be performed with a scan tool installed in the OBD-II port to confirm an issue is present.

  • The technician will visually inspect the wiring on both bank 1 and 2 sensor 2 looking for damaged wiring, broken wiring, swapped connectors, or wiring shorted to ground or power.

  • If the wiring passes the visual test, a continuity test will be performed with a multimeter for instance to tell us that the wiring has no breaks or shorts. This is done to rule the wiring out.

  • It is possible that all of these tests will be passed. If this occurs, the technician will perform a diagnostic test of the car’s ECU. These tests are specific to car makes and the manufacture will provide all steps to test the ECU.

Common mistakes when diagnosing the P0041 code

In general, this code is caused by previous repairs to the vehicle. Overlooking swapped connectors and jumping straight to ECU problems will cause test results to be faulty. Following step-by-step procedures prevents overlooking simple issues.

How serious is the P0041 code?

Though uncommon, P0041 can indicate a serious issue with the vehicle that will prevent normal and safe driving until repairs are made. This code may put the vehicle into a limp mode which prevents damage to the engine and catalytic converters. Any vehicle that is in limp mode or is running poorly should be inspected by a qualified technician before normal operation.

What repairs can fix the P0041 code?

There are a few potential fixes:

  • Bank 1 sensor 2 and bank 2 sensor 2 wiring or connectors must be swapped
  • Repairing or replacing any open, shorted, or damaged wiring
  • Swapping wiring to the proper side
  • In extreme cases, the ECU may be replaced

Additional comments for consideration regarding the P0041 code

P0041 is not a code that is seen often. Most likely it is due to repairs performed and a Check Engine Light will be present shortly after the repairs.

Need help with a P0041 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.

P0041
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0041 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

P0348 OBD-II Trouble Code: Camshaft Position Sensor A Circuit High Input (Bank 2)
Trouble code P0348 means the voltage reading from the camshaft position sensor circuit for camshaft sensor A in engine bank 2 is too high.
P0113 OBD-II Trouble Code: IAT Sensor Circuit High Input Problem
P0113 code definition Intake Air Temperature (IAT) sensor circuit high input problem What the P0113 code means P0113 is the OBD-II...
P0714 OBD-II Trouble Code: Transmission Fluid Temperature Sensor Circuit Intermittent
P0714 code means there is an abnormal transmission temperature often due too low transmission fluid and faulty parts.

Related questions

When driving the car it feels like it's gone into a higher gear.

Hello, thanks for writing in. Is your Check Engine Light illuminated? Your description sounds like your transmission may be in "limp mode" which is usually 2nd gear in many transmissions. It is also possible that the sensation you are getting...

Low Fuel Light on with fuel in tank

The fuel level sensors on some of these vehicles tend to be misread by the computer, causing faults in the system. The fuel sensor would need to be inspected, and the engine computer scanned, to see if the codes received...

2013 Dodge Charger Thermostat P0128

You will need to have the engine scanned and compare when engine is cold the engine coolant sensor and the ambient air temperature sensor to see if they read within 5 % of each other and the engine started and...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com