AutoCodes – Generic – U010F

U010F Code - Lost Communication With Air Conditioning Control 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 Air Conditioning Control Module, Air Conditioning Control Module harness is open or shorted, Air Conditioning Control 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: U010F indicates Lost Communication With Air Conditioning Control Module.
Common causes: Common causes include Faulty Air Conditioning Control Module, Air Conditioning Control Module harness is open or shorted, Air Conditioning Control 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 3,845

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 U010F 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 Air Conditioning Control Module has not been received.

OBDII Code U010F - Lost Communication With Air Conditioning Control Module - AutoCodes.com — U010F Code - Lost Communication With Air Conditioning Control Module

What does this mean?

What are the Possible Causes of the DTC U010F?

Faulty Air Conditioning Control Module
Air Conditioning Control Module harness is open or shorted
Air Conditioning Control Module circuit poor electrical connection

How to Fix the DTC U010F?

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 U010F 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 U010F code?

Need more information on how to fix the U010F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U010F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U010F Buick — Lost Communication With Air Conditioning Control Module
U010F Cadillac — Lost Communication With Air Conditioning Control Module
U010F Chevrolet — Lost Communication With Air Conditioning Control Module
U010F Ford — Lost Communication With Air Conditioning Control Module
U010F GMC — Lost Communication With Air Conditioning Control Module
U010F Lincoln — Lost Communication With Air Conditioning Control Module
U010F Mercury — Lost Communication With Air Conditioning Control Module

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 U010F Code

What does the OBDII code U010F mean?

The U010F code indicates a loss of communication between the vehicle's main computer (ECU) and the Air Conditioning Control Module (ACCM).

What are the common symptoms of the U010F code?

Common symptoms include the air conditioning not working, the A/C system not responding to controls, and possibly an illuminated check engine light or other warning indicators.

What causes the U010F code to appear?

This code is typically caused by faulty wiring, a malfunctioning Air Conditioning Control Module, network communication errors, or issues with the vehicle's CAN bus system.

Can a dead battery trigger the U010F code?

Yes, a weak or dead battery can disrupt communication between modules and potentially trigger the U010F code.

How do I diagnose the U010F code?

Start by checking for loose or damaged wiring, inspecting the connectors at the Air Conditioning Control Module, and testing the vehicle's communication network for continuity issues.

Can the U010F code affect other systems in the vehicle?

In some cases, communication issues may disrupt other modules on the CAN bus, potentially causing additional error codes or system malfunctions.

How much does it cost to fix the U010F code?

The cost depends on the root cause. Repairing damaged wiring or connectors may cost $50–$200, while replacing the Air Conditioning Control Module can cost $300–$1,000.

Can I reset the U010F code by disconnecting the battery?

Disconnecting the battery may temporarily clear the code, but if the underlying issue is unresolved, the code will likely return.

Is it safe to drive with the U010F code present?

Yes, but driving without a functional A/C system can be uncomfortable, and persistent communication issues may worsen over time if left unaddressed.

How can I prevent the U010F code from reoccurring?

Regular maintenance of the vehicle's electrical system, including inspecting and securing wiring and connectors, can help prevent this code from reappearing.