Engine-Codes - Infiniti - P1167 INFINITI

P1167 INFINITI - Heated Rear Oxygen Sensor 2 Maximum Voltage Monitoring Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1167 INFINITI Possible Causes

  • Faulty Heated Rear Oxygen Sensor Bank 2
  • Heated Rear Oxygen Sensor Bank 2 harness is open or shorted
  • Heated Rear Oxygen Sensor Bank 2 circuit poor electrical connection
  • Fuel pressure
  • Injectors
  • Intake air leaks

How is the P1167 INFINITI code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

Replacing the Rear Oxygen (O2) Sensor usually takes care of the problem

What is the cost to diagnose the P1167 INFINITI code

Labor: 1.0

The cost to diagnose the P1167 INFINITI code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?

The P1167 code is triggered when the maximum voltage from the sensor is not reached to the specified voltage.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible high fuel consumption
  • Possible excessive smoke from exhaust

P1167 INFINITI Meaning

The heated oxygen sensor 2 (rear), after three way catalyst, monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the heated oxygen sensor 1 (front) are shifted, the air fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 2. This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 2 is not used for engine control operation.

More Information

Need more information on how to fix the P1167 INFINITI code?
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Information for specific Infiniti models

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