AutoCodes – Volkswagen – P1131 Volkswagen

P1131 Volkswagen Code - HO2S21 Inner Resistance Too Large

Quick Answer

P1131 Volkswagen indicates HO2S21 Inner Resistance Too Large. Common causes include Faulty Heather Oxygen Sensor Bank 2 Sensor 1 (HO2S21), Heather Oxygen Sensor Bank 2 Sensor 1 harness is open or shorted, Heather Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection. 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: P1131 Volkswagen indicates HO2S21 Inner Resistance Too Large.
Common causes: Common causes include Faulty Heather Oxygen Sensor Bank 2 Sensor 1 (HO2S21), Heather Oxygen Sensor Bank 2 Sensor 1 harness is open or shorted, Heather Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection.
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 5,698

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 20, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1131 Volkswagen Description

OBDII Code P1131 Volkswagen - HO2S21 Inner Resistance Too Large - AutoCodes.com — P1131 Volkswagen Code - HO2S21 Inner Resistance Too Large

What does this mean?

What are the Possible Causes of the DTC P1131 Volkswagen?

Faulty Heather Oxygen Sensor Bank 2 Sensor 1 (HO2S21)
Heather Oxygen Sensor Bank 2 Sensor 1 harness is open or shorted
Heather Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection

How to Fix the DTC P1131 Volkswagen?

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 P1131 Volkswagen 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.