AutoCodes – Generic – P1134

P1134 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 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 36,621

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 Jan 03, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1134 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 - HO2S Transition Time Ratio Bank 1 Sensor 1 - AutoCodes.com — P1134 Code - HO2S Transition Time Ratio Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P1134?

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?

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 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 P1134 code?

Need more information on how to fix the P1134 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1134 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1134 Acura — HO2S Transition Time Ratio 11
P1134 Audi — HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Short To B+
P1134 BMW — O2 Sensor Heater Circuit Signal Intermittent Bank 1 Sensor 2
P1134 Buick — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 Cadillac — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 Chevrolet — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 Dodge — ECT Sensor Circuit Intermittent High Voltage
P1134 Ford — Bank 1 Fuel Control Shifted Rich
P1134 GMC — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 Honda — HO2S Transition Time Ratio 11
P1134 Hyundai — HO2S11 Transition Time Fault
P1134 Isuzu — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 KIA — HO2S11 Circuit Transition Switch Malfunction
P1134 Mazda — Bank 1 Fuel Control Shifted Rich
P1134 MINI — O2 Sensor Heater Circuit Signal Intermittent Bank 1 Sensor 2
P1134 Pontiac — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 Saturn — HO2S Transition Time Ratio Bank 1 Sensor 1
P1134 Subaru — Front Oxygen Sensor Microcomputer Problem
P1134 Suzuki — HO2S11 Transition Ratio
P1134 Volkswagen — HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Short To B+

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 P1134 Code

1. What does OBDII code P1134 mean?

The code P1134 stands for HO2S Transition Time Ratio Bank 1 Sensor 1, indicating an issue with the oxygen sensor's transition time ratio in the exhaust system.

2. What are the common symptoms of OBDII code P1134?

Common symptoms of code P1134 include poor fuel efficiency, rough idling, engine misfires, and an illuminated check engine light on the dashboard.

3. What can cause OBDII code P1134 to trigger?

Code P1134 can be triggered by a faulty oxygen sensor (Bank 1 Sensor 1), vacuum leaks, exhaust system leaks, wiring issues, or a problem with the engine's air-fuel mixture.

4. How can I diagnose the cause of OBDII code P1134?

To diagnose the cause of code P1134, you can use an OBDII scanner to read the code, inspect the oxygen sensor and wiring for damage, check for vacuum or exhaust leaks, and test the air-fuel ratio.

5. What are the repair options for OBDII code P1134?

Repair options for code P1134 may include replacing the oxygen sensor (Bank 1 Sensor 1), fixing any vacuum or exhaust leaks, repairing damaged wiring, and addressing issues with the air-fuel mixture.

6. Can I drive my vehicle with OBDII code P1134?

While it may be possible to drive your vehicle with code P1134, it is not recommended as it can lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter.

7. How urgent is it to fix OBDII code P1134?

It is advisable to address code P1134 promptly to prevent further damage to the engine or emissions system, maintain optimal fuel efficiency, and ensure proper vehicle performance.

8. How much does it typically cost to repair OBDII code P1134?

The cost to repair code P1134 can vary depending on the underlying issue, but it may range from $100 to $500, including parts and labor. Costs may be higher if additional components need replacement.

9. Can a DIY enthusiast fix OBDII code P1134?

While some DIY enthusiasts may be able to address code P1134 by replacing the oxygen sensor or fixing minor issues, diagnosing and repairing the root cause may require professional expertise and specialized tools.

10. How can I prevent OBDII code P1134 from recurring?

To prevent code P1134 from recurring, it is essential to perform regular vehicle maintenance, address any issues promptly, use high-quality fuel, and follow the manufacturer's recommended service intervals for the oxygen sensor.