AutoCodes – Buick – P1134 Buick

P1134 Buick Code - HO2S Transition Time Ratio Bank 1 Sensor 1

Quick Answer

The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) activity. Common causes include Faulty HO2S Bank 1 Sensor 1, HO2S Bank 1 Sensor 1 harness is open or shorted, HO2S Bank 1 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: P1134 Buick indicates HO2S Transition Time Ratio Bank 1 Sensor 1.
Common causes: Common causes include Faulty HO2S Bank 1 Sensor 1, HO2S Bank 1 Sensor 1 harness is open or shorted, HO2S Bank 1 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 6,078

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 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1134 Buick Description

The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) activity. During the monitor period the PCM counts the number of times that the HO2S responds from rich to lean and from lean to rich and adds the amount of time it took to complete all transitions. With this information, an average time for all transitions can be determined. The PCM then divides the rich to lean average by the lean to rich average to obtain a ratio.

OBDII Code P1134 Buick - HO2S Transition Time Ratio Bank 1 Sensor 1 - AutoCodes.com — P1134 Buick Code - HO2S Transition Time Ratio Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P1134 Buick?

Faulty HO2S Bank 1 Sensor 1
HO2S Bank 1 Sensor 1 harness is open or shorted
HO2S Bank 1 Sensor 1 circuit poor electrical connection

How to Fix the DTC P1134 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 P1134 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.