AutoCodes – Generic – U010A

U010A Code - Lost Communication With Exhaust Gas Recirculation Control Module 'A'

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 Exhaust Gas Recirculation Control Module 'A', Exhaust Gas Recirculation Control Module 'A' harness is open or shorted, Exhaust Gas Recirculation Control Module 'A' 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: U010A indicates Lost Communication With Exhaust Gas Recirculation Control Module 'A'.
Common causes: Common causes include Faulty Exhaust Gas Recirculation Control Module 'A', Exhaust Gas Recirculation Control Module 'A' harness is open or shorted, Exhaust Gas Recirculation Control Module 'A' 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 11,280

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 Mar 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U010A 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 Exhaust Gas Recirculation Control Module 'A' has not been received.

OBDII Code U010A - Lost Communication With Exhaust Gas Recirculation Control Module 'A' - AutoCodes.com — U010A Code - Lost Communication With Exhaust Gas Recirculation Control Module 'A'

What does this mean?

What are the Possible Causes of the DTC U010A?

Faulty Exhaust Gas Recirculation Control Module 'A'
Exhaust Gas Recirculation Control Module 'A' harness is open or shorted
Exhaust Gas Recirculation Control Module 'A' circuit poor electrical connection

How to Fix the DTC U010A?

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 U010A 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.

Need more information about the U010A code?

Need more information on how to fix the U010A code? Get Access to Factory Service Manuals

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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 U010A Code

1. What are common symptoms of OBDII code U010A?

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

2. What can cause the OBDII code U010A to appear?

- The code U010A typically appears when there is a communication failure between the engine control module (ECM) and the exhaust gas recirculation (EGR) control module.

3. How can I diagnose the issue related to code U010A?

- Diagnosing the issue may involve checking the wiring connections between the ECM and EGR control module, as well as using a diagnostic scanner to retrieve specific error codes.

4. Can a faulty EGR valve trigger the U010A code?

- While a faulty EGR valve may not directly trigger the U010A code, it can contribute to related issues that may lead to communication problems between the ECM and EGR control module.

5. What are some repair tips for resolving code U010A?

- Repair tips include inspecting and repairing any damaged wiring, ensuring proper connections between modules, and resetting the ECM after addressing the communication issue.

6. Is it safe to continue driving with the U010A code present?

- It is generally not recommended to continue driving with the U010A code present, as it can lead to further engine performance issues and potential damage if left unresolved.

7. Can a DIY enthusiast fix the U010A code issue at home?

- Depending on the root cause of the communication failure, some DIY enthusiasts with automotive repair knowledge may be able to address the U010A code at home by following repair guides or consulting with experts.

8. Are there any recalls related to the U010A code in certain vehicle models?

- Some vehicle manufacturers may have issued recalls related to the U010A code in specific models, so it's advisable to check with your vehicle manufacturer or authorized dealer for any relevant information.

9. How much does it typically cost to repair the U010A code at a professional auto repair shop?

- The cost of repairing the U010A code can vary depending on the underlying issue, but it may range from a couple of hundred to over a thousand dollars, including parts and labor.

10. What should I do if I encounter the U010A code despite attempting repairs?

- If the U010A code persists even after attempting repairs, it is recommended to seek assistance from a certified mechanic or dealership to further diagnose and address the issue effectively.