AutoCodes – Generic – U2172

U2172 Code - Lost Communication With Digital Radio Receiver

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Digital Radio Receiver (DRR), Digital Radio Receiver harness is open or shorted, Digital Radio Receiver 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: U2172 indicates Lost Communication With Digital Radio Receiver.
Common causes: Common causes include Faulty Digital Radio Receiver (DRR), Digital Radio Receiver harness is open or shorted, Digital Radio Receiver 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 3,223

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 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2172 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 U2172 - Lost Communication With Digital Radio Receiver - AutoCodes.com — U2172 Code - Lost Communication With Digital Radio Receiver

What does this mean?

What are the Possible Causes of the DTC U2172?

Faulty Digital Radio Receiver (DRR)
Digital Radio Receiver harness is open or shorted
Digital Radio Receiver circuit poor electrical connection

How to Fix the DTC U2172?

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 U2172 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 U2172 code?

Need more information on how to fix the U2172 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2172 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2172 Buick — Lost Communication With Digital Radio Receiver
U2172 Cadillac — Lost Communication With Digital Radio Receiver
U2172 Chevrolet — Lost Communication With Digital Radio Receiver
U2172 GMC — Lost Communication With Digital Radio Receiver

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 U2172 Code

1. What are the common symptoms of OBDII code U2172, Lost Communication With Digital Radio Receiver?

- Common symptoms include loss of radio functionality, no sound from the speakers, and a blank or frozen radio display.

2. What are the possible causes of OBDII code U2172?

- The code U2172 can be caused by issues such as a faulty digital radio receiver, damaged wiring or connectors, a blown fuse, or a software glitch in the radio system.

3. How can I diagnose the cause of OBDII code U2172?

- Diagnosing the code U2172 typically involves checking the wiring and connectors leading to the digital radio receiver, inspecting the fuse related to the radio system, and using a scan tool to communicate with the receiver.

4. What are some tips for repairing OBDII code U2172?

- Repairing the code U2172 may involve replacing the digital radio receiver if it is found to be faulty, repairing any damaged wiring or connectors, ensuring the fuse related to the radio system is intact, and updating the radio system software if needed.

5. Can OBDII code U2172 cause any other issues with the vehicle?

- While the code U2172 itself may not directly impact the drivability of the vehicle, the loss of communication with the digital radio receiver can affect the convenience and entertainment features of the vehicle.

6. Is it safe to continue driving with OBDII code U2172 present?

- It is generally safe to continue driving with the code U2172 present, but it is recommended to address the issue promptly to restore the functionality of the digital radio system.

7. Can resetting the vehicle's computer clear OBDII code U2172?

- Resetting the vehicle's computer may temporarily clear the code U2172, but if the underlying issue causing the communication loss with the digital radio receiver is not addressed, the code is likely to return.

8. How much does it typically cost to repair OBDII code U2172?

- The cost of repairing OBDII code U2172 can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and potential software updates.

9. Are there any recalls or technical service bulletins related to OBDII code U2172?

- It is recommended to check with the vehicle manufacturer or a dealership to inquire about any recalls or technical service bulletins related to OBDII code U2172 for specific makes and models.

10. Can a DIY enthusiast repair OBDII code U2172, or is it best left to professionals?

- Depending on the underlying cause, some DIY enthusiasts may be able to address OBDII code U2172 by checking wiring, connectors, and fuses. However, diagnosing and repairing electronic issues with the digital radio system may require professional expertise.