AutoCodes – GMC – U1827 GMC

U1827 GMC Code - Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus

Quick Answer

Devices connected to the powertrain high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Steering Angle Sensor Module, Steering Angle Sensor Module harness is open or shorted, Steering Angle Sensor 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: U1827 GMC indicates Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus.
Common causes: Common causes include Faulty Steering Angle Sensor Module, Steering Angle Sensor Module harness is open or shorted, Steering Angle Sensor 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 865

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1827 GMC Description

Devices connected to the powertrain high-speed General Motor Local Area Network (GMLAN) 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.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U1827 GMC - Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus - AutoCodes.com — U1827 GMC Code - Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus

What does this mean?

What are the Possible Causes of the DTC U1827 GMC?

Faulty Steering Angle Sensor Module
Steering Angle Sensor Module harness is open or shorted
Steering Angle Sensor Module circuit poor electrical connection

How to Fix the DTC U1827 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 U1827 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.

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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 U1827 GMC Code

What does the OBDII code U1827 indicate?

The OBDII code U1827 indicates that there is a lost communication with the steering angle sensor module on the Powertrain Expansion CAN Bus, which can affect vehicle stability and handling.

What are common symptoms associated with code U1827?

Common symptoms may include warning lights on the dashboard (such as the ABS or stability control lights), erratic steering behavior, and potential loss of other related functions like traction control.

What could cause the U1827 code to trigger?

The U1827 code can be triggered by faulty wiring or connectors, a malfunctioning steering angle sensor, issues with the CAN bus communication, or problems with the powertrain control module.

How can I diagnose the U1827 code?

To diagnose the U1827 code, check for other OBDII codes, inspect the wiring and connectors for damage, test the steering angle sensor for proper function, and verify that there are no communication issues within the CAN bus.

What repairs are recommended for code U1827?

Recommended repairs may include fixing or replacing damaged wiring or connectors, replacing a faulty steering angle sensor, and ensuring proper communication within the CAN bus by checking module connections.

Can I drive my vehicle with the U1827 code?

While it may be possible to drive your vehicle with the U1827 code, it is not advisable due to potential handling issues and the risk of losing important safety features like stability control.

How do I reset the U1827 code after repairs?

You can reset the U1827 code using an OBDII scanner to clear the code from the vehicleâ€™s computer after completing the necessary repairs.

Is it safe to ignore the U1827 code?

Ignoring the U1827 code is not safe, as it may lead to compromised vehicle handling and increased risk of accidents due to potential loss of steering stability functions.

Can the U1827 code affect other systems in my vehicle?

Yes, the U1827 code can affect other systems, particularly those related to vehicle stability, traction control, and potentially the anti-lock braking system (ABS).