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Engine-Codes – Generic – P014A

P014A Code - Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2

Quick Answer

The diagnostic trouble code (DTC) P014A indicates that there is a delayed response in the oxygen sensor located in Bank 2 Sensor 2, signaling a shift from a rich to lean air-fuel mixture. Common causes include Faulty oxygen sensor, Wiring or connector issues in the oxygen sensor circuit, Exhaust leaks near the oxygen sensor. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P014A indicates Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2.
Common causes
Common causes include Faulty oxygen sensor, Wiring or connector issues in the oxygen sensor circuit, Exhaust leaks near the oxygen sensor.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P014A Description

The diagnostic trouble code (DTC) P014A indicates that there is a delayed response in the oxygen sensor located in Bank 2 Sensor 2, signaling a shift from a rich to lean air-fuel mixture. This oxygen sensor is responsible for monitoring the exhaust gases after they have passed through the catalytic converter. The sensor measures the oxygen content in the exhaust gases and sends this data to the engine control module (ECM) to adjust the air-fuel ratio for optimal combustion.

OBDII Code P014A - Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2
P014A Code - Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2

Common Causes of P014A

  1. Faulty oxygen sensor.
  2. Wiring or connector issues in the oxygen sensor circuit.
  3. Exhaust leaks near the oxygen sensor.
  4. Contaminated or deteriorated fuel.
  5. Issues with the ECM or engine control system.

Symptoms of P014A

  1. Check Engine Light illuminated on the dashboard.
  2. Decreased fuel efficiency.
  3. Rough idling or stalling.
  4. Poor acceleration and overall engine performance.
  5. Increased emissions.

How to Fix P014A

  1. Begin by diagnosing the oxygen sensor in Bank 2 Sensor 2 using a scan tool to verify the P014A code.
  2. Inspect the wiring and connectors for any damage or corrosion and repair or replace as needed.
  3. Check for exhaust leaks near the oxygen sensor and fix any leaks found.
  4. Test the oxygen sensor's response using a multimeter or oscilloscope to determine if it is functioning properly. Replace the sensor if necessary.
  5. Clear the DTC, reset the ECM, and perform a test drive to ensure the issue has been resolved.

Cost to Fix P014A

The typical repair costs for addressing a P014A code can vary depending on the specific cause of the issue. In general, replacing an oxygen sensor can cost anywhere from $100 to $300, including parts and labor. However, additional costs may be incurred if wiring repairs or other components need attention. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the vehicle's make and model, as well as the extent of the repairs needed. Keep in mind that labor rates can vary, so it's recommended to research local rates for a more precise cost estimate.

What does this mean?

Tech Notes for P014A

Replacing the Rear Heated Oxygen Sensors (HO2S) usually takes care of the problem.











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Code P014A Information for Specific Makes

  • P014A Buick — HO2S Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Cadillac — HO2S Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Chevrolet — HO2S Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Ford — Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A GMC — HO2S Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Lincoln — Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Mercury — Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Pontiac — HO2S Delayed Response Rich to Lean Bank 2 Sensor 2
  • P014A Saturn — HO2S Delayed Response Rich to Lean Bank 2 Sensor 2
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.

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