AutoCodes – Ford – U02A2 Ford

U02A2 Ford 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 Ford 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 5,866

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

What does this mean?

What are the Possible Causes of the DTC U02A2 Ford?

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 Ford?

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 Ford 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 Ford Code

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

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

2. What can cause the OBDII code U02A2 Ford to appear?

- The code can be triggered by a faulty Reductant Quality Module, wiring or connection issues, software malfunctions, or a defective Powertrain Control Module (PCM).

3. How can I diagnose the source of the communication loss with the Reductant Quality Module?

- Proper diagnosis involves using a diagnostic scanner to retrieve the specific trouble codes, checking the wiring and connections to the module, and performing tests to identify any faulty components.

4. Can I continue driving my vehicle with the U02A2 code present?

- It is not recommended to continue driving with the U02A2 code active, as it can lead to further damage to the emissions control system and potentially impact engine performance.

5. What are the repair options for resolving the Lost Communication With Reductant Quality Module issue?

- Repair options include checking and repairing any damaged wiring or connections, replacing the Reductant Quality Module if necessary, updating software, or reprogramming the PCM.

6. How much does it typically cost to fix the U02A2 Ford trouble code?

- The cost of repairs can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Can I reset the code myself, or do I need a professional mechanic?

- While you can attempt to clear the code using a diagnostic scanner, it is essential to address the underlying issue causing the code for a proper repair. Seeking help from a professional mechanic is recommended.

8. Will the U02A2 Ford trouble code cause my vehicle to fail an emissions test?

- Yes, the presence of the U02A2 code typically indicates an issue with the emissions control system, which can result in a failed emissions test until the problem is resolved.

9. How long does it take to repair the Lost Communication With Reductant Quality Module issue?

- The repair time can vary depending on the complexity of the problem and the availability of parts. In some cases, repairs can be completed within a few hours, while more extensive issues may take longer.

10. Is the U02A2 code a common issue in Ford vehicles?

- While not extremely common, the U02A2 code can occur in Ford vehicles equipped with a Reductant Quality Module, particularly in models with emissions control systems.