P1134 – Infiniti DTC

Infiniti DTC P1134 – H02S Transition Time Ratio Bank 1 Sensor 1

DTC P1134 meaning on Infiniti

DTC P1134 on an Infiniti refers to the “HO2S Transition Time Ratio Bank 1 Sensor 1” diagnostic trouble code. This code indicates an issue with the transition time ratio of the heated oxygen sensor (HO2S) located in bank 1, sensor 1 of the vehicle’s exhaust system.

Infiniti DTC P1134 symptoms

Symptoms of DTC P1134 on an Infiniti may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Decreased fuel efficiency
• Engine running rough or misfiring
• Reduced engine performance

Infiniti DTC P1134 causes

Common causes of DTC P1134 on an Infiniti include:

• Malfunctioning heated oxygen sensor (HO2S)
• Wiring or connector issues in the HO2S circuit
• Exhaust system leaks
• Engine vacuum leaks

Infiniti DTC P1134 seriousness

DTC P1134 should not be ignored as it can lead to potential engine performance issues and decreased fuel efficiency. It is recommended to address this code promptly to prevent further damage to the vehicle.

How to diagnose DTC P1134 on Infiniti

To diagnose DTC P1134 on an Infiniti, follow these steps:

1. Use an OBD-II scanner to retrieve the specific fault code.
2. Inspect the wiring and connectors related to the HO2S in bank 1, sensor 1.
3. Check for exhaust leaks or engine vacuum leaks.
4. Test the HO2S for proper function or replace if necessary.

How to fix DTC P1134 on Infiniti

To fix DTC P1134 on an Infiniti, consider the following:

1. Repair any wiring or connector issues in the HO2S circuit.
2. Address any exhaust system leaks or engine vacuum leaks.
3. Replace the heated oxygen sensor (HO2S) in bank 1, sensor 1 if faulty.
4. Clear the fault code and reset the Check Engine Light using an OBD-II scanner.

How to erase DTC P1134 on Infiniti

To erase DTC P1134 on an Infiniti:

1. Use an OBD-II scanner to clear the fault code.
2. Follow the scanner’s instructions to reset the Check Engine Light.
3. Ensure the underlying issue causing the code has been addressed before clearing it.

Recommended tools for Infiniti diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.