Engine-Codes - Generic - P015A

P015A - Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1

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

P015A Possible Causes

  • Faulty Heated Oxygen Bank 1 Sensor 1
  • Heated Oxygen Bank 1 Sensor 1 harness is open or shorted
  • Heated Oxygen Bank 1 Sensor 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

How is the P015A 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.

What is the cost to diagnose the P015A code

Labor: 1.0

The cost to diagnose the P015A 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 response of the voltage signal from the sensor takes more than the specified time.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

P015A Meaning

The Powertrain Control Module (PCM) or Engine Control Module (ECM) continuously monitors the Heated Oxygen Sensor (HO2S) activity. During the monitor period the PCM/ECM 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, the PCM/ECM can determine the average time for all transitions. If the average response time is too slow, a DTC sets.

More Information

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Information for specific makes

  • P015A BUICK Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A CADILLAC Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A CHEVROLET Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A FORD Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A GMC Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A INFINITI Air Fuel Ratio Delayed Response - Rich To Lean Bank 1 Sensor 1
  • P015A LINCOLN Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A MERCURY Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A NISSAN Air Fuel Ratio Delayed Response - Rich To Lean Bank 1 Sensor 1
  • P015A PONTIAC Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1
  • P015A SATURN Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1

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