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Engine-Codes – Generic – U1827

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

Quick Answer

The U1827 diagnostic trouble code (DTC) indicates that there is a communication problem between the Powertrain Control Module (PCM) and the Steering Angle Sensor Module on the Powertrain Expansion Controller Area Network (CAN) Bus. Common causes include Damaged or corroded wiring/connectors in the CAN Bus network, Faulty Steering Angle Sensor Module, Malfunctioning PCM. 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 indicates Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus.
Common causes
Common causes include Damaged or corroded wiring/connectors in the CAN Bus network, Faulty Steering Angle Sensor Module, Malfunctioning PCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U1827 Description

The U1827 diagnostic trouble code (DTC) indicates that there is a communication problem between the Powertrain Control Module (PCM) and the Steering Angle Sensor Module on the Powertrain Expansion Controller Area Network (CAN) Bus. The Steering Angle Sensor Module is responsible for providing information about the steering angle of the vehicle, which is crucial for systems like stability control and traction control. When communication is lost between the PCM and the Steering Angle Sensor Module, it can lead to issues with the vehicle's stability and handling.

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

Common Causes of U1827

  1. Damaged or corroded wiring/connectors in the CAN Bus network.
  2. Faulty Steering Angle Sensor Module.
  3. Malfunctioning PCM.
  4. Software issues within the vehicle's control modules.
  5. Electrical interference or short circuits in the communication system.

Symptoms of U1827

  1. ABS or traction control warning lights illuminated on the dashboard.
  2. Loss of stability control or traction control functionality.
  3. Erratic steering behavior or lack of response from the steering wheel.
  4. Difficulty in maintaining control of the vehicle, especially in challenging driving conditions.
  5. Unusual noises coming from the steering system.

How to Fix U1827

  1. Perform a thorough inspection of the CAN Bus network, including checking for damaged wiring or connectors. Repair or replace any damaged components.
  2. Test the Steering Angle Sensor Module for proper functionality and replace if necessary.
  3. Check the PCM for any software updates or malfunctions and reprogram or replace as needed.
  4. Clear the DTC and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, consult a professional technician for further diagnosis and repair.

Cost to Fix U1827

The typical repair costs for addressing a U1827 code can vary depending on the specific cause of the issue. In general, parts and labor for this repair could range from $200 to $500. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's advisable to contact local auto repair shops for a more accurate estimate based on the specific circumstances. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often offer more competitive pricing.

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Code U1827 Information for Specific Makes

  • U1827 Buick — Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus
  • U1827 Cadillac — Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus
  • U1827 Chevrolet — Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus
  • U1827 GMC — Lost Communication With Steering Angle Sensor Module On Powertrain Expansion CAN Bus
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 Code

1. What are the common symptoms of OBDII code U1827?

The common symptoms of OBDII code U1827 include issues with the electronic power steering, warning lights on the dashboard (such as the ABS or stability control light), and potential loss of power steering assistance.

2. What causes the OBDII code U1827 to trigger?

The U1827 code is triggered when the engine control module (ECM) detects a loss of communication with the steering angle sensor module on the powertrain expansion CAN bus. This can be caused by wiring issues, a faulty module, or a communication network problem.

3. How serious is the U1827 code?

The U1827 code should be addressed promptly as it can affect the proper functioning of the electronic power steering system. Ignoring this code may lead to safety concerns and difficulties in steering the vehicle.

4. How can I diagnose the U1827 code?

Diagnosing the U1827 code usually involves checking the wiring and connections related to the steering angle sensor module, testing the module itself, and verifying the communication on the CAN bus using a diagnostic scan tool.

5. Can I still drive my vehicle with the U1827 code present?

It is not recommended to drive your vehicle with the U1827 code present, especially if you are experiencing issues with the power steering system. Continued driving may pose safety risks and potentially cause further damage.

6. What are some common repair tips for fixing the U1827 code?

Common repair tips for the U1827 code include checking and repairing any damaged wiring, replacing the steering angle sensor module if necessary, and ensuring proper communication on the CAN bus by addressing network issues.

7. Will resetting the trouble codes make the U1827 code go away?

Resetting the trouble codes may temporarily clear the U1827 code, but if the underlying issue causing the code is not addressed, it is likely to reappear once the ECM detects the communication problem again.

8. How much does it typically cost to repair the U1827 code?

The cost of repairing the U1827 code can vary depending on the cause of the issue, the extent of repairs needed, and labor rates. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

9. Can I fix the U1827 code myself?

While some DIY enthusiasts may attempt to diagnose and fix the U1827 code themselves, it is recommended to seek assistance from a qualified mechanic or technician due to the complexity of the electronic systems involved.

10. Is the U1827 code specific to certain vehicle makes and models?

The U1827 code can be found in various vehicle makes and models equipped with an electronic power steering system and CAN bus communication network. It is important to consult the specific vehicle's service manual for accurate diagnostic and repair information.

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