AutoCodes – Generic – U0016

U0016 Code - Medium Speed CAN Communication Bus (-) Low

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module. 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: U0016 indicates Medium Speed CAN Communication Bus (-) Low.
Common causes: Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module.
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 7,214

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 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0016 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 supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0016 - Medium Speed CAN Communication Bus (-) Low - AutoCodes.com — U0016 Code - Medium Speed CAN Communication Bus (-) Low

What does this mean?

What are the Possible Causes of the DTC U0016?

Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0016?

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 U0016 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 U0016 code?

Need more information on how to fix the U0016 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0016 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0016 Chrysler — CAN Communication Interior Bus (-) Low
U0016 Dodge — CAN Communication Interior Bus (-) Low
U0016 Ford — Medium Speed CAN Communication Bus (-) Low
U0016 Jeep — CAN Communication Interior Bus (-) Low
U0016 Lincoln — Medium Speed CAN Communication Bus (-) Low
U0016 Mercury — Medium Speed CAN Communication Bus (-) Low
U0016 RAM — CAN Communication Interior Bus (-) Low

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 U0016 Code

1. What are the common symptoms of OBDII code U0016 (Medium Speed CAN Communication Bus (-) Low)?

- Common symptoms include issues with the vehicle's transmission shifting erratically, dashboard warning lights illuminating, and difficulties with electronic components.

2. What are the possible causes of OBDII code U0016?

- The code U0016 is typically triggered by problems such as a damaged wiring harness, loose connections in the CAN network, or a faulty control module.

3. How can I diagnose the source of OBDII code U0016?

- To diagnose the issue, it is recommended to perform a thorough inspection of the wiring harness, check for loose connections in the CAN network, and use a diagnostic scanner to identify the exact cause.

4. What are some repair tips for fixing OBDII code U0016?

- Repair tips include repairing or replacing any damaged wiring, securing loose connections in the CAN network, and resetting the fault codes after the repairs are completed.

5. Can I drive my vehicle with OBDII code U0016 present?

- It is not recommended to drive the vehicle with code U0016 present as it can affect the proper operation of critical vehicle systems and may lead to further damage.

6. How much does it typically cost to repair OBDII code U0016?

- The cost of repairing OBDII code U0016 can vary depending on the underlying cause, but it may range from a few hundred to a few thousand dollars, including parts and labor.

7. Is it possible to clear OBDII code U0016 without fixing the underlying issue?

- While it is possible to clear the code temporarily, it is crucial to address the root cause of the problem to prevent the code from reappearing and ensure the vehicle operates correctly.

8. Are there any recalls related to OBDII code U0016?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code U0016 for specific vehicle models.

9. Can a DIY enthusiast fix OBDII code U0016 at home?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair OBDII code U0016 at home, but professional assistance is recommended for complex issues.

10. How long does it take to repair OBDII code U0016?

- The repair time for OBDII code U0016 can vary based on the cause of the issue, but it may take a few hours to a full day to diagnose, repair, and clear the fault code.