Infiniti Error Code P1273: How to Fix It

Q: Can I drive my Infiniti with P1273 code?

You can drive short distances but should fix it soon. The code may cause poor fuel economy, rough idling, and potential damage to the catalytic converter if left untreated for extended periods.

Q: How much does it cost to fix P1273?

DIY repair costs $50-150 for a new air-fuel ratio sensor. Professional repair typically ranges from $200-400 including parts and labor, depending on your location and specific Infiniti model.

Q: What causes P1273 code in Infiniti vehicles?

Common causes include faulty air-fuel ratio sensor, damaged wiring or connectors, exhaust leaks before the sensor, or rarely, PCM issues. The sensor itself is the most frequent culprit.

Q: Will P1273 cause my Infiniti to fail emissions test?

Yes, this code will likely cause your vehicle to fail emissions testing since it directly affects the air-fuel mixture monitoring system required for proper emissions control.

Q: How do I prevent P1273 code from returning?

Use quality fuel, follow regular maintenance schedules, fix exhaust leaks promptly, and avoid using aftermarket air intake modifications that can affect sensor readings.

Abstract

The P1273 error code in your Infiniti indicates the Air-Fuel Ratio Sensor 1 Circuit has a low input signal on Bank 1. This sensor monitors the oxygen content in your exhaust to help optimize fuel mixture for better performance and emissions. When this circuit fails, you may notice poor fuel economy, rough idling, or reduced engine performance.