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Engine-Codes – Dodge – P2249 Dodge

P2249 Dodge Code - O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1

Quick Answer

The P2249 diagnostic trouble code (DTC) for Dodge vehicles indicates an issue with the O2 sensor reference voltage circuit being low on Bank 2 Sensor 1. Common causes include Faulty O2 sensor, Damaged wiring or connectors in the O2 sensor circuit, ECM software issues. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P2249 Dodge indicates O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1.
Common causes
Common causes include Faulty O2 sensor, Damaged wiring or connectors in the O2 sensor circuit, ECM software issues.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2249 Dodge Description

The P2249 diagnostic trouble code (DTC) for Dodge vehicles indicates an issue with the O2 sensor reference voltage circuit being low on Bank 2 Sensor 1. The O2 sensor, also known as the oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases to help the engine control module (ECM) adjust the air-fuel mixture for optimal combustion. Bank 2 refers to the side of the engine that does not contain cylinder number 1, while Sensor 1 denotes the upstream O2 sensor located before the catalytic converter.

OBDII Code P2249 Dodge - O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
P2249 Dodge Code - O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1

Common Causes of P2249 Dodge

  1. Faulty O2 sensor
  2. Damaged wiring or connectors in the O2 sensor circuit
  3. ECM software issues
  4. Exhaust leaks near the O2 sensor
  5. Engine coolant leaks contaminating the O2 sensor

Symptoms of P2249 Dodge

  1. Decreased fuel efficiency
  2. Engine running rough or misfiring
  3. Check Engine Light illuminated
  4. Poor acceleration or hesitation
  5. Increased emissions

How to Fix P2249 Dodge

  1. Diagnose the issue by using a scan tool to retrieve the DTC and inspect the O2 sensor and related components.
  2. Check the wiring and connectors for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the O2 sensor's reference voltage using a multimeter to verify if it falls within the specified range.
  4. Replace the O2 sensor if it is found to be faulty or if the reference voltage is outside the acceptable range.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P2249 Dodge

The typical repair costs for addressing a P2249 code on a Dodge vehicle may range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It is advisable to consult with a certified mechanic or auto repair shop for a more accurate estimate based on the vehicle's make and model, as well as any additional factors that may affect the repair process. Keep in mind that labor rates can vary, so it is recommended to request quotes from multiple sources to find the best price for the repair.

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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 P2249 Dodge Code

What does the OBDII code P2249 mean on a Dodge vehicle?

Code P2249 indicates a problem with the O2 sensor reference voltage circuit being too low for Bank 2, Sensor 1.

What are the symptoms of a P2249 code on a Dodge?

Common symptoms include poor fuel economy, rough idling, reduced engine performance, and the illumination of the check engine light.

What causes the P2249 code to appear on a Dodge?

Possible causes include a faulty O2 sensor, damaged wiring or connectors, a malfunctioning PCM, or a short in the reference voltage circuit.

Can I drive my Dodge with a P2249 code?

Driving with this code is not recommended, as it can lead to poor engine performance and potential damage to the catalytic converter over time.

How do I diagnose a P2249 code on a Dodge?

Use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, and test the O2 sensor and reference voltage circuit with a multimeter.

How do I fix the P2249 code on my Dodge?

Repairs may include replacing the O2 sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming/replacing the PCM.

Is the O2 sensor always the problem when a P2249 code appears?

No, while the O2 sensor is a common cause, issues with the wiring, connectors, or PCM can also trigger this code.

How much does it cost to repair a P2249 code on a Dodge?

The cost can range from $100 to $300 for O2 sensor replacement, but wiring or PCM repairs may increase the total cost.

What tools are needed to fix a P2249 code on a Dodge?

You may need an OBDII scanner, a multimeter, a socket set, and possibly a wiring repair kit or replacement parts.

Can a P2249 code cause long-term damage to my Dodge vehicle?

Yes, ignoring this code can lead to excessive fuel consumption, damage to the catalytic converter, and poor engine performance over time.

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