AutoCodes – Generic – P2190

P2190 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 30,351

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
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P2190?

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?

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 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 code?

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

Need Help with the Code?

Get the P2190 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2190 Buick — Fuel Trim System Rich At Idle Bank 2
P2190 Cadillac — Fuel Trim System Rich At Idle Bank 2
P2190 Chevrolet — Fuel Trim System Rich At Idle Bank 2
P2190 Chrysler — System Too Rich At Idle Bank 2
P2190 Dodge — System Too Rich At Idle Bank 2
P2190 GMC — Fuel Trim System Rich At Idle Bank 2
P2190 Jeep — System Too Rich At Idle Bank 2
P2190 Mercedes-Benz — System Too Rich At Idle Bank 2
P2190 Pontiac — Fuel Trim System Rich At Idle Bank 2
P2190 RAM — System Too Rich At Idle Bank 2
P2190 Saturn — Fuel Trim System Rich At Idle Bank 2
P2190 Smart — System Too Rich At Idle Bank 2

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.