AutoCodes – Cadillac – U1133 Cadillac

U1133 Cadillac Code - Lost Communications With DVD Player

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty DVD Player, DVD Player harness is open or shorted, DVD Player 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: U1133 Cadillac indicates Lost Communications With DVD Player .
Common causes: Common causes include Faulty DVD Player, DVD Player harness is open or shorted, DVD Player 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 434

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 Apr 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1133 Cadillac Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1133 is set.

OBDII Code U1133 Cadillac - Lost Communications With DVD Player - AutoCodes.com — U1133 Cadillac Code - Lost Communications With DVD Player

What does this mean?

What are the Possible Causes of the DTC U1133 Cadillac?

Faulty DVD Player
DVD Player harness is open or shorted
DVD Player circuit poor electrical connection

How to Fix the DTC U1133 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 U1133 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.

Need more information about the U1133 Cadillac code?

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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 U1133 Cadillac Code

What does the OBDII code U1133 mean for my Cadillac?

U1133 indicates a "Lost Communications With DVD Player" error, meaning that the vehicle's computer is unable to communicate with the DVD player system.

What are the common symptoms of the U1133 code?

Common symptoms include the DVD player not functioning, error messages on the display, and possibly issues with other multimedia features in the vehicle.

What could cause the U1133 code to trigger?

Causes may include a faulty DVD player, damaged wiring or connectors, software issues, or problems with related control modules.

How can I diagnose the U1133 code?

Start by checking the DVD player and its connections for any signs of damage. Use a scan tool to see if other codes are present and inspect wiring harnesses for continuity.

Can I drive my Cadillac with the U1133 code?

While you can drive the vehicle, the multimedia system may not function properly, and it could indicate other underlying issues that may need attention.

What are some potential repairs for the U1133 code?

Repairs may include replacing the DVD player, repairing or replacing damaged wiring or connectors, and updating the vehicle's software.

Is the U1133 code serious?

The code itself is not critical for vehicle operation, but it can affect entertainment features and may indicate a need for further diagnosis.

Will clearing the code fix the problem?

Clearing the code may temporarily remove the error message, but if the underlying issue is not resolved, the code will likely reappear.

How much might it cost to fix the U1133 code?

Repair costs can vary widely depending on the issue, ranging from simple wiring repairs to replacing the DVD player, potentially costing anywhere from $100 to over $500.

Should I consult a professional mechanic for the U1133 code?

If you are not comfortable diagnosing or repairing the issue yourself, it is advisable to consult a professional mechanic for a thorough inspection and repair.