AutoCodes – GMC – P2190 GMC

P2190 GMC 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 GMC 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 1,602

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

What does this mean?

What are the Possible Causes of the DTC P2190 GMC?

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 GMC?

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 GMC 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 P2190 GMC code?

Need more information on how to fix the P2190 GMC 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 P2190 GMC Code

1. What are the common symptoms of OBDII code P2190 (GMC) indicating a Fuel Trim System Rich At Idle Bank 2 issue?

- Common symptoms may include rough idle, decreased fuel efficiency, engine hesitation, and potential black smoke from the exhaust.

2. What are the possible causes of OBDII code P2190 (GMC) triggering a Fuel Trim System Rich At Idle Bank 2 error?

- Some possible causes include a faulty oxygen sensor, a vacuum leak, a malfunctioning fuel injector, a dirty air filter, or issues with the fuel pressure regulator.

3. How can I diagnose the OBDII code P2190 (GMC) related to Fuel Trim System Rich At Idle Bank 2?

- Diagnosis typically involves using an OBDII scanner to read the code, checking for any other related codes, inspecting the oxygen sensor, conducting a fuel pressure test, and looking for vacuum leaks.

4. Is it safe to drive with OBDII code P2190 (GMC) indicating a Fuel Trim System Rich At Idle Bank 2 problem?

- It is generally not recommended to drive for an extended period with this issue, as it can lead to further damage to the engine and negatively impact performance.

5. How can I repair OBDII code P2190 (GMC) associated with a Fuel Trim System Rich At Idle Bank 2 fault?

- Repair options may include replacing the oxygen sensor, fixing any vacuum leaks, cleaning or replacing the air filter, addressing fuel injector issues, or adjusting the fuel pressure regulator.

6. Can a DIY enthusiast fix OBDII code P2190 (GMC) on their own?

- Depending on the specific cause, some DIY enthusiasts with automotive repair experience may be able to address simpler issues like replacing the air filter or oxygen sensor. However, more complex problems may require professional assistance.

7. What is the typical cost to repair OBDII code P2190 (GMC) related to a Fuel Trim System Rich At Idle Bank 2 malfunction?

- The repair cost can vary significantly based on the root cause of the issue and whether you choose to address it yourself or seek professional help. Costs may range from a few hundred dollars to over a thousand dollars.

8. How long does it usually take to repair OBDII code P2190 (GMC) connected to a Fuel Trim System Rich At Idle Bank 2 error?

- The repair time can vary depending on the specific problem and the expertise of the person performing the repair. Simple fixes may take a few hours, while more complex issues could require a day or more to resolve.

9. Will resetting the OBDII code P2190 (GMC) eliminate the Fuel Trim System Rich At Idle Bank 2 problem?

- Simply resetting the code will not fix the underlying issue causing the error. It is essential to diagnose the problem, address the root cause, and clear the code after the repair has been completed.

10. Are there any preventative maintenance steps to avoid triggering OBDII code P2190 (GMC) for Fuel Trim System Rich At Idle Bank 2 in the future?

- Regularly servicing your vehicle, replacing the air filter as recommended, using high-quality fuel, and addressing any engine performance issues promptly can help prevent the recurrence of this error code.