AutoCodes – MINI – P2189 MINI

P2189 MINI Code - System Too Lean At Idle Bank 2

Quick Answer

In order to provide the best possible combination of drivability, fuel economy and emission control, the Powertrain Control Module (PCM) uses a closed loop air/fuel metering system. Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring. 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: P2189 MINI indicates System Too Lean At Idle Bank 2.
Common causes: Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring.
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 1,957

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2189 MINI Description

In order to provide the best possible combination of drivability, fuel economy and emission control, the Powertrain Control Module (PCM) uses a closed loop air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based it in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition.

OBDII Code P2189 MINI - System Too Lean At Idle Bank 2 - AutoCodes.com — P2189 MINI Code - System Too Lean At Idle Bank 2

What does this mean?

What are the Possible Causes of the DTC P2189 MINI?

Intake air leaks
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Incorrect fuel pressure
Lack of fuel
Faulty Mass Air Flow (MAF) sensor
Incorrect Positive Crankcase Ventilation (PCV) hose connection

How to Fix the DTC P2189 MINI?

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 P2189 MINI 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 P2189 MINI code?

Need more information on how to fix the P2189 MINI code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P2189 MINI Code

1. What are the common symptoms of OBDII code P2189 in a MINI?

The common symptoms of code P2189 "System Too Lean At Idle Bank 2" in a MINI may include rough idle, hesitation or stalling at idle, decreased fuel efficiency, and potential exhaust odor.

2. What are the possible causes of OBDII code P2189 in a MINI?

Possible causes of code P2189 in a MINI include a vacuum leak, faulty oxygen sensor, intake air leaks, fuel delivery issues, faulty PCV system, or a malfunctioning mass airflow sensor.

3. How can I diagnose OBDII code P2189 in my MINI?

To diagnose code P2189, you can start by checking for any visible signs of vacuum leaks, inspecting the oxygen sensor, conducting a smoke test to detect leaks, testing the mass airflow sensor, and checking the fuel delivery system.

4. Can a dirty air filter trigger OBDII code P2189 in a MINI?

Yes, a dirty air filter can restrict airflow to the engine, causing a lean air-fuel mixture, which may trigger code P2189 in a MINI. It is recommended to regularly replace the air filter to prevent this issue.

5. How can I repair OBDII code P2189 in my MINI?

Depending on the root cause, repairing code P2189 may involve fixing vacuum leaks, replacing the oxygen sensor, addressing intake air leaks, cleaning or replacing the mass airflow sensor, fixing the PCV system, or resolving fuel delivery issues.

6. Is it safe to continue driving with OBDII code P2189 present in my MINI?

It is not recommended to continue driving with OBDII code P2189 present in your MINI, as it can lead to engine performance issues and potentially cause further damage if left unresolved. It is advisable to address the issue promptly.

7. Can a malfunctioning catalytic converter trigger OBDII code P2189 in a MINI?

Yes, a malfunctioning catalytic converter can cause code P2189 in a MINI by not effectively processing the exhaust gases, leading to improper air-fuel mixture readings. It is important to inspect the catalytic converter if other causes have been ruled out.

8. Will resetting the OBDII code P2189 in my MINI make the issue disappear?

Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing code P2189. It is crucial to diagnose and repair the root cause to prevent the code from reoccurring.

9. Can extreme weather conditions contribute to triggering OBDII code P2189 in a MINI?

Extreme weather conditions, such as very cold temperatures, can sometimes exacerbate existing issues that may trigger code P2189 in a MINI. Ensuring your vehicle is properly maintained can help prevent weather-related problems.

10. How can regular maintenance help prevent OBDII code P2189 in a MINI?

Regular maintenance, including timely replacement of air filters, checking for vacuum leaks, monitoring the oxygen sensor, and inspecting the PCV system, can help prevent issues that may trigger code P2189 in a MINI by ensuring optimal engine performance.