AutoCodes – Buick – U216B Buick

U216B Buick Code - Lost Communication With Rear Object Detection Control Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Rear Object Detection Control Module, Rear Object Detection Control Module harness is open or shorted, Rear Object Detection 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: U216B Buick indicates Lost Communication With Rear Object Detection Control Module.
Common causes: Common causes include Faulty Rear Object Detection Control Module, Rear Object Detection Control Module harness is open or shorted, Rear Object Detection 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 513

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 Jun 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U216B Buick Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U216B Buick - Lost Communication With Rear Object Detection Control Module - AutoCodes.com — U216B Buick Code - Lost Communication With Rear Object Detection Control Module

What does this mean?

What are the Possible Causes of the DTC U216B Buick?

Faulty Rear Object Detection Control Module
Rear Object Detection Control Module harness is open or shorted
Rear Object Detection Control Module circuit poor electrical connection

How to Fix the DTC U216B Buick?

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 U216B Buick 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 U216B Buick Code

1. What are the common symptoms of OBDII code U216B (Lost Communication With Rear Object Detection Control Module) in a Buick?

- Common symptoms include malfunctioning rear parking sensors, disabled rear cross-traffic alert system, and warning lights on the dashboard.

2. What are the possible causes of OBDII code U216B in a Buick?

- The code can be triggered by issues such as a faulty rear object detection control module, damaged wiring or connectors, or a software glitch.

3. How can I diagnose the cause of OBDII code U216B in my Buick?

- To diagnose the issue, you can use an OBDII scanner to check for the specific error codes, visually inspect the wiring and connectors, and perform a reset of the rear object detection system.

4. Can a DIY enthusiast repair OBDII code U216B in a Buick?

- While some simple fixes like checking and securing connections may be possible for DIY enthusiasts, more complex issues may require professional diagnostic tools and expertise.

5. Is it safe to drive my Buick with OBDII code U216B present?

- It is generally safe to drive with this code, but you may lose the functionality of the rear object detection system, so extra caution is advised when parking or reversing.

6. How much does it typically cost to repair OBDII code U216B in a Buick?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a simple connector repair costing around $50 to a module replacement costing several hundred dollars.

7. What steps can I take to prevent OBDII code U216B from recurring in my Buick?

- Regularly inspecting and maintaining the rear object detection system, avoiding water damage to sensors, and ensuring proper wiring connections can help prevent this code from recurring.

8. Will resetting the OBDII codes make OBDII code U216B disappear?

- Resetting the codes may temporarily clear the warning lights, but if the underlying issue is not fixed, the code is likely to reappear after a short period of driving.

9. Can extreme weather conditions cause OBDII code U216B to trigger in a Buick?

- Yes, extreme temperatures or moisture exposure can sometimes lead to temporary communication issues with the rear object detection control module, triggering this code.

10. How long does it typically take to repair OBDII code U216B in a Buick at a professional repair shop?

- The repair time can vary based on the exact cause of the issue, but it may take anywhere from 1-3 hours for diagnosis and repair by a qualified technician.