AutoCodes – Cadillac – U2172 Cadillac

U2172 Cadillac 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 Cadillac 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 1,179

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 Cadillac 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 Cadillac - Lost Communication With Digital Radio Receiver - AutoCodes.com — U2172 Cadillac Code - Lost Communication With Digital Radio Receiver

What does this mean?

What are the Possible Causes of the DTC U2172 Cadillac?

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 Cadillac?

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 Cadillac 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 U2172 Cadillac Code

What does the OBDII code U2172 mean for a Cadillac?

The U2172 code indicates a lost communication with the digital radio receiver, suggesting that the vehicle's control module cannot communicate with the radio unit.

What are common symptoms associated with the U2172 code?

Common symptoms may include the radio not functioning, loss of sound, display issues, or intermittent operation of the infotainment system.

What could cause the U2172 code to be triggered?

Possible causes include a faulty digital radio receiver, wiring issues, poor connections, or problems within the vehicle's control modules.

How can I diagnose the U2172 code?

You can diagnose the U2172 code by using an OBDII scanner to confirm the code and checking the wiring and connections between the digital radio receiver and the control module.

What should I check first if I encounter the U2172 code?

Start by inspecting the wiring and connectors for any signs of damage, corrosion, or loose connections that may be interrupting communication.

Can I drive my Cadillac with the U2172 code?

While you can drive the vehicle, you may experience issues with the radio and infotainment system, so it's advisable to address the code as soon as possible.

What repairs might be necessary to fix the U2172 code?

Repairs may include replacing the digital radio receiver, repairing damaged wiring, or re-establishing poor connections in the communication circuit.

Is the U2172 code specific to certain Cadillac models?

The U2172 code can occur in various Cadillac models equipped with digital radio receivers, but the specific symptoms and repairs may vary by model and year.

How much might it cost to repair the U2172 code?

Repair costs can vary widely based on the cause; replacing the digital radio receiver may range from $200 to $600, while simple wiring repairs may be less expensive.