AutoCodes – RAM – P2190 RAM

P2190 RAM Code - System Too 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 Leaking fuel injector or pressure regulator, High fuel pressure condition, Faulty Oxygen (O2) Sensor. 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 RAM indicates System Too Rich At Idle Bank 2.
Common causes: Common causes include Leaking fuel injector or pressure regulator, High fuel pressure condition, Faulty Oxygen (O2) Sensor.
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 1,266

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 RAM 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 RAM - System Too Rich At Idle Bank 2 - AutoCodes.com — P2190 RAM Code - System Too Rich At Idle Bank 2

What does this mean?

What are the Possible Causes of the DTC P2190 RAM?

Leaking fuel injector or pressure regulator
High fuel pressure condition
Faulty Oxygen (O2) Sensor
Faulty Mass Air Flow (MAF) sensor

How to Fix the DTC P2190 RAM?

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 RAM 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 RAM Code

1. What does the OBDII code P2190 mean for a RAM vehicle?

P2190 indicates that the engine control module (ECM) has detected an excessively rich air-fuel mixture on Bank 2 during idle conditions.

2. What are the common symptoms of code P2190 on a RAM?

Symptoms may include rough idling, black smoke from the exhaust, reduced fuel efficiency, hesitation during acceleration, and an illuminated check engine light.

3. What causes the P2190 code on a RAM?

Potential causes include a faulty oxygen sensor, leaking fuel injectors, a clogged air filter, a malfunctioning mass air flow (MAF) sensor, or a vacuum leak on Bank 2.

4. Is it safe to drive a RAM with the P2190 code?

Driving with this code may lead to poor performance and engine damage over time. Itâ€™s best to address the issue promptly to avoid further complications.

5. How can I diagnose the P2190 code on my RAM?

Start by inspecting the air filter, oxygen sensors, and fuel injectors on Bank 2. Use a scan tool to check related sensor readings and perform a smoke test to detect vacuum leaks.

6. Can a dirty mass air flow (MAF) sensor cause a P2190 code?

Yes, a dirty or malfunctioning MAF sensor can send incorrect air intake readings to the ECM, leading to a rich mixture and triggering the code.

7. What is Bank 2 in a RAM engine?

Bank 2 refers to the side of the engine opposite Bank 1. It is determined by the cylinder layout, with Bank 1 typically housing cylinder 1.

8. How do I fix the P2190 code on a RAM?

Repairs may include cleaning or replacing the MAF sensor, replacing faulty oxygen sensors, repairing vacuum leaks, or addressing fuel injector issues on Bank 2.

9. Can a bad fuel pressure regulator cause the P2190 code?

Yes, a faulty fuel pressure regulator can cause excess fuel to enter the system, leading to a rich condition and triggering the code.

10. How much does it cost to fix the P2190 code on a RAM?

Repair costs vary depending on the cause but can range from $100 for a sensor replacement to $500 or more for extensive repairs like injector or fuel system work.