AutoCodes – Volkswagen – P1104 Volkswagen

P1104 Volkswagen Code - HO2S12 Sensor Circuit Voltage Too Low Air Leak

Quick Answer

P1104 Volkswagen indicates HO2S12 Sensor Circuit Voltage Too Low Air Leak. Common causes include Faulty HO2S12 Sensor, Exhaust leak near HO2S12 Sensor, HO2S12 Sensor harness is open or shorted. 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: P1104 Volkswagen indicates HO2S12 Sensor Circuit Voltage Too Low Air Leak.
Common causes: Common causes include Faulty HO2S12 Sensor, Exhaust leak near HO2S12 Sensor, HO2S12 Sensor harness is open or shorted.
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 3,614

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 Apr 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1104 Volkswagen Description

OBDII Code P1104 Volkswagen - HO2S12 Sensor Circuit Voltage Too Low Air Leak - AutoCodes.com — P1104 Volkswagen Code - HO2S12 Sensor Circuit Voltage Too Low Air Leak

What does this mean?

What are the Possible Causes of the DTC P1104 Volkswagen?

Faulty HO2S12 Sensor
Exhaust leak near HO2S12 Sensor
HO2S12 Sensor harness is open or shorted
HO2S12 Sensor circuit poor electrical connection

How to Fix the DTC P1104 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 P1104 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.