AutoCodes – Chrysler – U02A2 Chrysler

U02A2 Chrysler 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 Chrysler 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 1,166

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

What does this mean?

What are the Possible Causes of the DTC U02A2 Chrysler?

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 Chrysler?

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 Chrysler 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 Chrysler Code

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

- Common symptoms include the Check Engine Light illuminating, reduced engine performance, and potential issues with the vehicle's emissions system.

2. What can cause the U02A2 code to trigger?

- The U02A2 code is typically triggered by a communication error between the vehicle's onboard computer and the Reductant Quality Module, which monitors the vehicle's emissions system.

3. How can I diagnose the U02A2 code?

- Diagnosing the U02A2 code usually involves using a diagnostic scanner to retrieve the code, checking for any related codes, and inspecting the wiring and connections between the onboard computer and the Reductant Quality Module.

4. What are some possible repair tips for the U02A2 code?

- Repairing the U02A2 code may involve checking and repairing any damaged wiring or connections, resetting the code with a diagnostic scanner, or replacing the Reductant Quality Module if necessary.

5. Can I drive my vehicle with the U02A2 code present?

- It is not recommended to drive your vehicle with the U02A2 code present, as it can lead to potential issues with the vehicle's emissions system and may cause reduced engine performance.

6. How much does it typically cost to repair the U02A2 code?

- The cost of repairing the U02A2 code can vary depending on the underlying cause. Simple fixes like repairing wiring may be relatively inexpensive, while replacing the Reductant Quality Module can be more costly.

7. Is the U02A2 code a common issue in Chrysler vehicles?

- The U02A2 code (Lost Communication With Reductant Quality Module) is a specific diagnostic trouble code that may occur in Chrysler vehicles equipped with an emissions system monitored by a Reductant Quality Module.

8. Can I reset the U02A2 code without fixing the underlying issue?

- While you can reset the U02A2 code with a diagnostic scanner, it is important to address the underlying communication issue between the onboard computer and the Reductant Quality Module to prevent the code from reoccurring.

9. How long does it take to repair the U02A2 code?

- The repair time for the U02A2 code can vary depending on the specific cause and the extent of the repair needed. Simple fixes may take a short amount of time, while more complex issues may require more time for diagnosis and repair.

10. Can a DIY enthusiast fix the U02A2 code themselves?

- DIY enthusiasts with some automotive repair experience may be able to diagnose and repair simple causes of the U02A2 code, such as checking and repairing wiring connections. However, more complex issues may require professional diagnosis and repair.