AutoCodes – Mercury – P014B Mercury

P014B Mercury Code - Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 2

Quick Answer

During a Deceleration Fuel Shut-Off (DFSO) event, the Powertrain Control Module (PCM) monitors the rear heated oxygen sensor (HO2S) signal to determine if the signal is stuck in range. Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 Sensor 2 circuit poor electrical connection. 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: P014B Mercury indicates Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 Sensor 2 circuit poor electrical connection.
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.

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Code Popularity 1,081

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P014B Mercury Description

During a Deceleration Fuel Shut-Off (DFSO) event, the Powertrain Control Module (PCM) monitors the rear heated oxygen sensor (HO2S) signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. The test fails when, after three consecutive intrusive attempts, the signal cannot be forced greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. The test fails when after three consecutive occurrences the signal is not less than the calibrated lean value.

OBDII Code P014B Mercury - Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 2 - AutoCodes.com — P014B Mercury Code - Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P014B Mercury?

Faulty Heated Oxygen Bank 2 Sensor 2
Heated Oxygen Bank 2 Sensor 2 harness is open or shorted
Heated Oxygen Bank 2 Sensor 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P014B Mercury?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P014B Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.

Frequently Asked Questions about P014B Mercury Code

1. What are the common symptoms of OBDII code P014B in a Mercury vehicle?

- Common symptoms include poor fuel efficiency, rough idling, engine misfires, and the illumination of the Check Engine light.

2. What does the OBDII code P014B Mercury indicate?

- The code P014B indicates a delayed response from the oxygen sensor located in bank 2, sensor 2 of the exhaust system, signaling a lean to rich condition.

3. What are the possible causes of OBDII code P014B in a Mercury vehicle?

- Possible causes include a faulty oxygen sensor, wiring or connector issues, exhaust leaks, fuel system problems, or issues with the engine's air intake system.

4. How can I diagnose the cause of OBDII code P014B in my Mercury car?

- To diagnose the issue, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the oxygen sensor and its wiring, check for exhaust leaks, and perform tests on the fuel system and air intake components.

5. What are some repair tips for addressing OBDII code P014B in a Mercury vehicle?

- Repair tips may include replacing the oxygen sensor in bank 2, sensor 2, repairing any damaged wiring or connectors, fixing exhaust leaks, and addressing any issues with the fuel or air intake systems.

6. Can I continue driving my Mercury with OBDII code P014B present?

- It is not recommended to continue driving with the code present, as it can lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter over time.

7. How much does it typically cost to repair OBDII code P014B in a Mercury vehicle?

- The cost of repairs can vary depending on the specific cause of the issue, but it may range from $100 to $400 for parts and labor, with additional costs if other components need to be replaced.

8. Is OBDII code P014B a common issue in Mercury vehicles?

- While not extremely common, OBDII code P014B can occur in Mercury vehicles, especially in older models or those with high mileage.

9. Can I reset the Check Engine light after repairing OBDII code P014B in my Mercury?

- Yes, once the underlying issue causing the code has been addressed and repaired, you can reset the Check Engine light using an OBDII scanner to clear the code.

10. How often should I check the oxygen sensors in my Mercury to prevent OBDII code P014B from occurring?

- It is recommended to check and potentially replace the oxygen sensors in your Mercury as part of regular maintenance, typically every 60,000 to 100,000 miles, to prevent issues like OBDII code P014B.