AutoCodes – GMC – U1133 GMC

U1133 GMC 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 GMC 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 612

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

What does this mean?

What are the Possible Causes of the DTC U1133 GMC?

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

How to Fix the DTC U1133 GMC?

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 GMC 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 GMC code?

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Need Help with the 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 GMC Code

What does the OBDII code U1133 mean for my GMC vehicle?

U1133 indicates that there is a loss of communication with the DVD player, which may affect entertainment features.

What are common symptoms associated with the U1133 code?

Common symptoms include the DVD player not functioning, error messages on the display, and the inability to access media features.

What could cause the U1133 code to trigger?

The code can be triggered by a faulty DVD player, damaged wiring or connectors, or issues with the vehicle's communication network.

How can I diagnose the U1133 code?

To diagnose U1133, check for other related codes, inspect the wiring and connectors for damage, and test the DVD player for functionality.

What should I do if I receive the U1133 code?

Start by checking the DVD player's connections and wiring. If everything looks good, consider testing or replacing the DVD player.

Can a dead battery cause the U1133 code?

Yes, a dead or weak battery can lead to communication issues, potentially triggering the U1133 code.

Is it safe to drive with the U1133 code?

While it is generally safe to drive, you may lose access to entertainment features until the issue is resolved.

How much will it cost to fix the U1133 code?

Repair costs can vary widely depending on whether it's a simple wiring issue or if the DVD player needs to be replaced, typically ranging from $100 to $500.

Can I reset the U1133 code myself?

Yes, you can use an OBDII scanner to clear the code, but if the underlying issue isnâ€™t fixed, the code may return.