AutoCodes – Generic – P114B

P114B Code - Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean Bank 1

Quick Answer

The diagnostic function monitors the lambda closed-loop mixture control. Common causes include Leak in exhaust system, Catalytic converter clogged, Faulty Pressure Sensors on Intake. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P114B indicates Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean Bank 1.
Common causes: Common causes include Leak in exhaust system, Catalytic converter clogged, Faulty Pressure Sensors on Intake.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,553

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P114B Description

The diagnostic function monitors the lambda closed-loop mixture control. The Engine Control Module (ECM) sets the OBDII code when the lambda closed-loop mixture is not to factory specifications.

OBDII Code P114B - Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean Bank 1 - AutoCodes.com — P114B Code - Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean Bank 1

What does this mean?

What are the Possible Causes of the DTC P114B?

Leak in exhaust system
Catalytic converter clogged
Faulty Pressure Sensors on Intake
Pressure Sensors on Intake harness is open or shorted
Pressure Sensors on Intake circuit poor electrical connection
Faulty Fuel injector

How to Fix the DTC P114B?

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 P114B 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.

Need more information about the P114B code?

Need more information on how to fix the P114B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P114B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P114B BMW — Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean Bank 1
P114B MINI — Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean Bank 1

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 P114B Code

1. What are the common symptoms of OBDII code P114B?

- Common symptoms include a check engine light, rough idling, decreased fuel efficiency, and potential misfires.

2. What are the possible causes of code P114B?

- Possible causes include a faulty oxygen sensor, vacuum leaks, clogged fuel filter, fuel injector issues, or a failing catalytic converter.

3. How can I diagnose OBDII code P114B?

- Diagnosis typically involves using a scan tool to read the code, checking for any related codes, inspecting the oxygen sensor, and checking for any visible signs of damage or leaks.

4. Can a dirty air filter cause code P114B?

- A dirty air filter can restrict airflow and affect the fuel mixture, potentially leading to a lean condition that triggers code P114B.

5. How should I repair OBDII code P114B?

- Repair methods may include replacing the oxygen sensor, addressing any vacuum leaks, cleaning or replacing the fuel filter, checking fuel injectors, or replacing a failing catalytic converter.

6. Can driving with code P114B cause further damage to my vehicle?

- Driving with code P114B can lead to decreased fuel efficiency, potential engine misfires, and further damage to the catalytic converter over time if left unresolved.

7. Is it safe to ignore code P114B and continue driving?

- It is not recommended to ignore code P114B, as it can lead to more serious issues with engine performance, emissions, and overall vehicle operation.

8. How long does it typically take to repair OBDII code P114B?

- The repair time for code P114B can vary depending on the exact cause and the complexity of the repair needed, but it may take anywhere from a few hours to a day.

9. Can I reset the check engine light after repairing code P114B myself?

- Yes, you can reset the check engine light using an OBDII scan tool after repairing the issue causing code P114B. This will clear the code and turn off the light.

10. Will code P114B cause my vehicle to fail an emissions test?

- Yes, code P114B indicates a potential issue with the post-catalyst fuel trim, which can affect emissions output and may cause your vehicle to fail an emissions test.