AutoCodes – Pontiac – P1134 Pontiac

P1134 Pontiac 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 Pontiac 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 4,827

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
FAQs
Comments
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Code P1134 Pontiac 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 Pontiac - HO2S Transition Time Ratio Bank 1 Sensor 1 - AutoCodes.com — P1134 Pontiac Code - HO2S Transition Time Ratio Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P1134 Pontiac?

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 Pontiac?

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 Pontiac 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.

Frequently Asked Questions about P1134 Pontiac Code

What does the OBDII code P1134 mean on a Pontiac?

Code P1134 indicates an issue with the HO2S (Heated Oxygen Sensor) Transition Time Ratio for Bank 1 Sensor 1, meaning the sensor isn't switching between rich and lean as expected.

What are the common symptoms of P1134 on a Pontiac?

Symptoms may include poor fuel economy, rough idling, engine hesitation, a check engine light, and reduced overall engine performance.

What causes the P1134 code to appear in a Pontiac?

Common causes include a faulty oxygen sensor, exhaust leaks, wiring or connector issues, or an engine running too rich or too lean.

Can I drive my Pontiac with a P1134 code?

While it's possible to drive, it's not recommended. Prolonged driving with this code can lead to decreased performance, higher emissions, and potential damage to the catalytic converter.

How do I diagnose the P1134 code in my Pontiac?

Use an OBDII scanner to confirm the code, inspect the oxygen sensor and wiring for damage, check for exhaust leaks, and test the sensor's voltage output with a multimeter.

How do I fix the P1134 code on a Pontiac?

Repairs may involve replacing the Bank 1 Sensor 1 oxygen sensor, fixing exhaust leaks, repairing damaged wiring, or addressing engine performance issues such as air-fuel mixture imbalances.

What is Bank 1 Sensor 1 in a Pontiac?

Bank 1 refers to the side of the engine with cylinder 1, and Sensor 1 is the oxygen sensor located upstream (before the catalytic converter) on that side.

How much does it cost to fix the P1134 code on a Pontiac?

Repair costs vary but typically range from $150 to $400, depending on parts and labor, with oxygen sensor replacement being the most common fix.

Can a dirty air filter cause a P1134 code in a Pontiac?

Yes, a dirty air filter can disrupt the air-fuel mixture, potentially causing issues with the oxygen sensor and triggering the P1134 code.

Will clearing the P1134 code fix the problem on my Pontiac?

Clearing the code may temporarily turn off the check engine light, but it won't fix the underlying issue. Proper diagnosis and repair are needed to resolve the problem.