AutoCodes – Dodge – P2191 Dodge

P2191 Dodge Code - System Too Lean At Higher Load Bank 1

Quick Answer

In order to provide the best possible combination of driveability, fuel economy and emission control, the Powertrain Control Module (PCM) uses a closed loop air/fuel metering system. Common causes include Faulty fuel injector, Faulty Mass Air Flow (MAF) sensor, Low fuel pressure condition. 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: P2191 Dodge indicates System Too Lean At Higher Load Bank 1.
Common causes: Common causes include Faulty fuel injector, Faulty Mass Air Flow (MAF) sensor, Low fuel pressure condition.
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 3,861

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2191 Dodge Description

In order to provide the best possible combination of driveability, fuel economy and emission control, the Powertrain Control Module (PCM) uses a closed loop air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based it in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition.

OBDII Code P2191 Dodge - System Too Lean At Higher Load Bank 1 - AutoCodes.com — P2191 Dodge Code - System Too Lean At Higher Load Bank 1

What does this mean?

What are the Possible Causes of the DTC P2191 Dodge?

Faulty fuel injector
Faulty Mass Air Flow (MAF) sensor
Low fuel pressure condition
Faulty front HO2S
Leak in the exhaust system
Faulty PCV system

How to Fix the DTC P2191 Dodge?

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 P2191 Dodge 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 P2191 Dodge Code

What does the OBDII code P2191 mean on a Dodge vehicle?

P2191 indicates that the engine control module (ECM) has detected a lean air-fuel mixture condition in Bank 1 while the engine is under higher load conditions.

What are the common symptoms of P2191 in a Dodge?

Symptoms may include poor engine performance, hesitation during acceleration, reduced fuel efficiency, rough idling, and in some cases, an illuminated check engine light.

What causes the P2191 code to trigger on a Dodge?

Common causes include vacuum leaks, a failing mass airflow (MAF) sensor, a clogged fuel injector, low fuel pressure, a malfunctioning oxygen sensor, or exhaust leaks upstream of the O2 sensor.

Can a dirty air filter cause the P2191 code on a Dodge?

While it’s less common, a severely clogged air filter can disrupt the air-fuel ratio and potentially contribute to a lean condition under high load.

How can I diagnose the P2191 code on my Dodge?

Start by checking for vacuum leaks, inspecting the MAF sensor, testing fuel pressure, examining the O2 sensors, and looking for exhaust leaks. Use a scan tool to monitor live engine data for further insights.

Is it safe to drive a Dodge with the P2191 code?

Driving with this code is not recommended, as a lean condition can lead to engine damage over time, including overheating and potential piston or valve damage.

How can I fix the P2191 code on my Dodge?

Repairs may involve fixing vacuum leaks, cleaning or replacing the MAF sensor, replacing faulty O2 sensors, repairing exhaust leaks, or addressing fuel delivery issues like a weak fuel pump or clogged fuel injectors.

Can a bad fuel pump cause the P2191 code on a Dodge?

Yes, a failing fuel pump can result in low fuel pressure, causing a lean condition under high engine load and triggering the P2191 code.

Do I need to replace the oxygen sensor if I get the P2191 code?

Not necessarily. While a faulty O2 sensor can cause this code, it’s important to diagnose the issue properly, as the sensor may simply be reporting a lean condition caused by another problem.

How much does it typically cost to fix the P2191 code on a Dodge?

Repair costs can vary widely, ranging from $50 for simple fixes like replacing a clogged air filter to $500 or more for complex repairs like fuel pump replacement or addressing multiple issues.