AutoCodes – Land Rover – P1129 Land Rover

P1129 Land Rover Code - HO2S Swapped Sensors Left Side To Right Side

Quick Answer

P1129 Land Rover indicates HO2S Swapped Sensors Left Side To Right Side. Common causes include HO2S Swapped Sensors Left Side To Right Side. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1129 Land Rover indicates HO2S Swapped Sensors Left Side To Right Side.
Common causes: Common causes include HO2S Swapped Sensors Left Side To Right Side.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,058

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1129 Land Rover Description

OBDII Code P1129 Land Rover - HO2S Swapped Sensors Left Side To Right Side - AutoCodes.com — P1129 Land Rover Code - HO2S Swapped Sensors Left Side To Right Side

What does this mean?

What are the Possible Causes of the DTC P1129 Land Rover?

HO2S Swapped Sensors Left Side To Right Side

How to Fix the DTC P1129 Land Rover?

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 P1129 Land Rover 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.

Need more information about the P1129 Land Rover code?

Need more information on how to fix the P1129 Land Rover code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P1129 Land Rover Code

1. What are the common symptoms of OBDII code P1129 on a Land Rover related to HO2S swapped sensors left side to right side?

- The common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.

2. What does the OBDII code P1129 on a Land Rover mean when it indicates HO2S swapped sensors left side to right side?

- This code indicates that the oxygen sensor (HO2S) on the left side of the engine has been mistakenly connected to the wiring for the sensor on the right side.

3. What are the possible causes of OBDII code P1129 on a Land Rover showing HO2S swapped sensors left side to right side?

- The main causes are incorrect sensor installation, faulty wiring connections, or misrouted sensor wiring harnesses.

4. How can I diagnose OBDII code P1129 on a Land Rover if it points to HO2S swapped sensors left side to right side?

- To diagnose this issue, you should visually inspect the oxygen sensor connections and wiring, ensuring they are correctly positioned and connected to the proper sides.

5. Can OBDII code P1129 on a Land Rover related to HO2S swapped sensors left side to right side cause long-term damage if left unrepaired?

- While driving with swapped oxygen sensors may not immediately cause severe damage, it can lead to decreased engine efficiency and potential catalytic converter damage over time.

6. What is the recommended repair for OBDII code P1129 on a Land Rover indicating HO2S swapped sensors left side to right side?

- The recommended repair involves correctly swapping the oxygen sensors to their respective sides, ensuring proper connections and routing of the wiring harnesses.

7. Should I reset the OBDII code P1129 on my Land Rover after fixing the HO2S swapped sensors left side to right side issue?

- Yes, it is recommended to clear the error code after resolving the sensor swapping problem to ensure accurate monitoring of the vehicle's performance.

8. Can a DIY enthusiast fix OBDII code P1129 on a Land Rover caused by HO2S swapped sensors left side to right side?

- Yes, if you have the necessary tools and knowledge, you can correct this issue by carefully inspecting and swapping the oxygen sensors yourself.

9. Is it safe to continue driving my Land Rover with OBDII code P1129 related to HO2S swapped sensors left side to right side until I can repair it?

- It is best to address the issue promptly to avoid potential engine performance issues and prevent any further damage to the vehicle's components.

10. How can I prevent OBDII code P1129 from reoccurring on my Land Rover due to HO2S swapped sensors left side to right side in the future?

- To prevent this issue from happening again, double-check the correct installation of oxygen sensors during any future maintenance or repairs on your Land Rover.