AutoCodes – Dodge – U02A2 Dodge

U02A2 Dodge Code - Lost Communication With Reductant Quality Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Reductant Quality Module, Reductant Quality Module harness is open or shorted, Reductant Quality Module circuit poor electrical connection. 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: U02A2 Dodge indicates Lost Communication With Reductant Quality Module.
Common causes: Common causes include Faulty Reductant Quality Module, Reductant Quality Module harness is open or shorted, Reductant Quality Module circuit poor electrical connection.
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 1,221

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 Apr 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U02A2 Dodge Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Reductant Quality Module has not been received.

OBDII Code U02A2 Dodge - Lost Communication With Reductant Quality Module - AutoCodes.com — U02A2 Dodge Code - Lost Communication With Reductant Quality Module

What does this mean?

What are the Possible Causes of the DTC U02A2 Dodge?

Faulty Reductant Quality Module
Reductant Quality Module harness is open or shorted
Reductant Quality Module circuit poor electrical connection

How to Fix the DTC U02A2 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 U02A2 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 U02A2 Dodge Code

1. What are the common symptoms of OBDII code U02A2 (Lost Communication With Reductant Quality Module) in a Dodge vehicle?

- Common symptoms include the Check Engine Light (CEL) illuminating, reduced engine performance, and potential issues with emissions control systems.

2. What could cause the OBDII code U02A2 to trigger in a Dodge?

- The code U02A2 usually triggers due to a communication breakdown between the vehicle's onboard computer system and the Reductant Quality Module, which is responsible for managing emissions system components.

3. How can I diagnose the OBDII code U02A2 in my Dodge?

- Diagnosing the U02A2 code typically involves using an OBDII scanner to retrieve the specific fault code, checking for any loose or damaged wiring connections, and verifying the functionality of the Reductant Quality Module.

4. What are some recommended repair tips for resolving the U02A2 code in a Dodge?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connection to the Reductant Quality Module, and performing a reset of the fault code to see if the issue resolves.

5. Can the OBDII code U02A2 in a Dodge be fixed without professional help?

- Depending on your automotive knowledge and skills, simple fixes such as checking and reconnecting wiring may be possible without professional help. However, more complex issues may require the expertise of a qualified mechanic.

6. Is it safe to continue driving with the U02A2 code illuminated in my Dodge?

- While the vehicle may still be driveable with the U02A2 code present, it is recommended to address the issue promptly to avoid potential damage to emissions components and ensure proper vehicle performance.

7. How much does it typically cost to repair the U02A2 code in a Dodge?

- Repair costs for the U02A2 code can vary depending on the underlying cause of the communication error and the extent of repairs needed. It is advisable to obtain quotes from different mechanics for an accurate estimate.

8. Can a faulty Reductant Quality Module cause the U02A2 code in a Dodge?

- Yes, a faulty Reductant Quality Module can contribute to triggering the U02A2 code. It is essential to diagnose the specific cause of the communication loss to determine if the module needs to be repaired or replaced.

9. Will resetting the U02A2 code make it go away permanently in a Dodge?

- Resetting the U02A2 code may temporarily clear the Check Engine Light, but if the underlying issue causing the communication error is not addressed, the code is likely to reappear. It is crucial to diagnose and fix the root cause.

10. How long does it typically take to repair the U02A2 code in a Dodge?

- The repair time for the U02A2 code can vary depending on the complexity of the issue, availability of parts, and the mechanic's workload. Simple fixes may take a short time, while more intricate problems could require more extensive repairs.