AutoCodes – Generic – U010B

U010B Code - Lost Communication With Exhaust Gas Recirculation Control Module 'B'

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 'B', Exhaust Gas Recirculation Control Module 'B' harness is open or shorted, Exhaust Gas Recirculation Control Module 'B' 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: U010B indicates Lost Communication With Exhaust Gas Recirculation Control Module 'B'.
Common causes: Common causes include Faulty Exhaust Gas Recirculation Control Module 'B', Exhaust Gas Recirculation Control Module 'B' harness is open or shorted, Exhaust Gas Recirculation Control Module 'B' 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 5,133

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 U010B 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 'B' has not been received.

OBDII Code U010B - Lost Communication With Exhaust Gas Recirculation Control Module 'B' - AutoCodes.com — U010B Code - Lost Communication With Exhaust Gas Recirculation Control Module 'B'

What does this mean?

What are the Possible Causes of the DTC U010B?

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

How to Fix the DTC U010B?

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 U010B 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 U010B Code

1. What are the common symptoms of OBDII code U010B - Lost Communication With Exhaust Gas Recirculation Control Module 'B'?

- Common symptoms include engine stalling, poor acceleration, rough idling, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code U010B?

- Possible causes include a faulty EGR control module, damaged wiring or connectors in the EGR system, software issues, or a communication network problem.

3. How can I diagnose OBDII code U010B?

- Diagnosis involves using a scan tool to retrieve the code, checking for any other related codes, inspecting the EGR control module and its connections, and performing a continuity test on the wiring.

4. Can I continue driving my vehicle with OBDII code U010B?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine problems and potential safety issues. Immediate attention is advised.

5. How can I repair OBDII code U010B?

- Repair options include replacing the faulty EGR control module, repairing any damaged wiring or connectors, updating software if necessary, and clearing the code with a scan tool.

6. Is it possible to reset OBDII code U010B without fixing the underlying issue?

- While you can clear the code temporarily with a scan tool, the underlying issue must be addressed to prevent the code from reappearing.

7. Are there any DIY tips for resolving OBDII code U010B?

- DIY tips include checking for loose or damaged connections in the EGR system, ensuring proper grounding, and following a systematic approach to diagnose and repair the issue.

8. How much does it typically cost to repair OBDII code U010B at a professional auto repair shop?

- The cost can vary depending on the exact cause of the issue, but expect to pay anywhere from $100 to $500 for parts and labor at a professional auto repair shop.

9. Can a faulty EGR valve cause OBDII code U010B to appear?

- While a faulty EGR valve can cause related issues, the specific communication problem indicated by U010B is more likely related to the EGR control module or its connectivity.

10. How long does it usually take to repair OBDII code U010B?

- Repair times can vary based on the complexity of the issue and the availability of parts. In general, a skilled mechanic can typically resolve this problem within a few hours to a day.