AutoCodes – Saturn – P2190 Saturn

P2190 Saturn 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 Saturn 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 569

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

What does this mean?

What are the Possible Causes of the DTC P2190 Saturn?

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 Saturn?

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 Saturn 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 Saturn code?

Need more information on how to fix the P2190 Saturn code? Get Access to Factory Service Manuals

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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 Saturn Code

1. What does the OBDII code P2190 mean on a Saturn?

The P2190 code indicates that the fuel trim system is running too rich at idle on Bank 2, meaning there is too much fuel and not enough air in the air-fuel mixture.

2. What are the common symptoms of code P2190 in a Saturn?

Symptoms may include poor fuel economy, rough idling, black smoke from the exhaust, a strong fuel smell, and possibly a check engine light.

3. What causes the P2190 code on a Saturn?

Common causes include a faulty oxygen sensor, a leaking fuel injector, a dirty mass airflow sensor, a vacuum leak, or a faulty fuel pressure regulator.

4. How serious is the P2190 code on a Saturn?

While the vehicle may still be drivable, prolonged driving with a rich fuel mixture can damage the catalytic converter and reduce engine performance.

5. How can I diagnose the P2190 code on a Saturn?

Start by checking for vacuum leaks, inspecting the oxygen sensors, testing the fuel injectors, and cleaning the mass airflow sensor. Use a scan tool to monitor fuel trim data for further insights.

6. Can a dirty air filter cause the P2190 code on a Saturn?

Yes, a dirty or clogged air filter can restrict airflow and contribute to a rich fuel mixture, potentially triggering this code.

7. What repairs can fix the P2190 code on a Saturn?

Repairs may include replacing a faulty oxygen sensor, cleaning or replacing the mass airflow sensor, fixing vacuum leaks, repairing or replacing fuel injectors, or replacing the fuel pressure regulator.

8. Can bad fuel cause the P2190 code on a Saturn?

Contaminated or poor-quality fuel can affect combustion and fuel trim, potentially contributing to this code.

9. Will resetting the check engine light fix the P2190 code on a Saturn?

Resetting the light may temporarily clear the code, but the underlying issue must be addressed to prevent the code from returning.

10. Is it safe to drive a Saturn with the P2190 code?

Driving with this code for a short time may be safe, but itâ€™s important to fix the issue promptly to prevent further engine or catalytic converter damage.