AutoCodes – Pontiac – P2190 Pontiac

P2190 Pontiac Code - Fuel Trim System Rich At Idle Bank 2

Quick Answer

The Engine Control Module (ECM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. Common causes include Dirty Air Filter, Dirty Mass Air Flow Sensor (MAF), Leaking fuel pressure regulator. 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: P2190 Pontiac indicates Fuel Trim System Rich At Idle Bank 2.
Common causes: Common causes include Dirty Air Filter, Dirty Mass Air Flow Sensor (MAF), Leaking fuel pressure regulator.
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 732

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 Sep 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2190 Pontiac Description

The Engine Control Module (ECM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. Fuel delivery is controlled differently during Open Loop and Closed Loop. During Open Loop, the ECM determines fuel delivery based on sensor signals without heated oxygen sensor (HO2S) input. During Closed Loop, the ECM adds HO2S inputs to calculate the short and long term fuel trim (FT) adjustments. If the HO2S indicates a lean condition, the fuel trim values will be above 0 percent. If the HO2S indicates a rich condition, the FT values will be below 0 percent. The short term FT values change rapidly in response to the HO2S voltage signals. The long term FT makes coarse adjustments in order to maintain an air/fuel ratio of 14.7:1.

OBDII Code P2190 Pontiac - Fuel Trim System Rich At Idle Bank 2 - AutoCodes.com — P2190 Pontiac Code - Fuel Trim System Rich At Idle Bank 2

What does this mean?

What are the Possible Causes of the DTC P2190 Pontiac?

Dirty Air Filter
Dirty Mass Air Flow Sensor (MAF)
Leaking fuel pressure regulator
Leaking fuel injector
Faulty Mass Air Flow Sensor (MAF)

How to Fix the DTC P2190 Pontiac?

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 P2190 Pontiac 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 P2190 Pontiac Code

1. What are the common symptoms of OBDII code P2190 on a Pontiac related to the Fuel Trim System Rich At Idle Bank 2?

- Common symptoms include rough idle, decreased fuel efficiency, engine stalling, and a noticeable decrease in overall engine performance.

2. What are the possible causes of OBDII code P2190 on a Pontiac indicating a rich fuel trim condition at idle on Bank 2?

- The code can be triggered by issues such as a faulty oxygen sensor, a vacuum leak, a malfunctioning fuel injector, or a problem with the mass airflow sensor.

3. How can a Pontiac owner diagnose the OBDII code P2190 related to a rich fuel trim at idle on Bank 2?

- Diagnosing the code can involve inspecting the oxygen sensor readings, checking for vacuum leaks, testing the fuel injectors, and examining the mass airflow sensor for any abnormalities.

4. What are some basic repair tips for resolving OBDII code P2190 on a Pontiac indicating a rich fuel trim condition at idle on Bank 2?

- Repair tips may include replacing a faulty oxygen sensor, fixing any vacuum leaks, cleaning or replacing clogged fuel injectors, and cleaning or replacing the mass airflow sensor.

5. Is it safe to continue driving a Pontiac with the OBDII code P2190 related to a rich fuel trim condition at idle on Bank 2?

- It is generally not recommended to continue driving the vehicle with this code as it can lead to further engine damage and decreased fuel efficiency. It is best to address the issue promptly.

6. Can resetting the OBDII code P2190 on a Pontiac resolve the issue of a rich fuel trim at idle on Bank 2?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the rich fuel trim condition. Proper diagnosis and repair are necessary.

7. How can a Pontiac owner prevent OBDII code P2190 related to a rich fuel trim at idle on Bank 2 from occurring in the future?

- Regular maintenance, such as replacing oxygen sensors at recommended intervals, checking for and repairing vacuum leaks promptly, and ensuring proper fuel injector function, can help prevent this code from reoccurring.

8. Are there any specific Pontiac models known to be more prone to experiencing OBDII code P2190 indicating a rich fuel trim condition at idle on Bank 2?

- While any Pontiac model with an OBDII system can potentially experience this issue, some models may have higher instances due to common factors like age, mileage, and maintenance history.

9. How much can a Pontiac owner expect to spend on repairing OBDII code P2190 related to a rich fuel trim at idle on Bank 2?

- The cost of repairs can vary depending on the specific cause of the issue, but Pontiac owners should budget for expenses related to parts replacement, labor costs, and potential diagnostic fees.

10. Can a Pontiac owner with basic automotive knowledge and tools attempt to diagnose and repair OBDII code P2190 related to a rich fuel trim at idle on Bank 2?

- While some simple tasks like checking for vacuum leaks can be done by DIY enthusiasts, diagnosing and repairing the root cause of the rich fuel trim condition may require professional expertise and specialized equipment.