AutoCodes – GMC – U0293 GMC

U0293 GMC Code - Lost Communication With Hybrid/EV Powertrain Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Powertrain Control Module, Hybrid/EV Powertrain Control Module harness is open or shorted, Hybrid/EV Powertrain Control 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: U0293 GMC indicates Lost Communication With Hybrid/EV Powertrain Control Module.
Common causes: Common causes include Faulty Hybrid/EV Powertrain Control Module, Hybrid/EV Powertrain Control Module harness is open or shorted, Hybrid/EV Powertrain Control 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 909

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0293 GMC Description

Modules connected to the 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 modules. The modules 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 module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Hybrid/EV Powertrain Control Module has not been received.

OBDII Code U0293 GMC - Lost Communication With Hybrid/EV Powertrain Control Module - AutoCodes.com — U0293 GMC Code - Lost Communication With Hybrid/EV Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U0293 GMC?

Faulty Hybrid/EV Powertrain Control Module
Hybrid/EV Powertrain Control Module harness is open or shorted
Hybrid/EV Powertrain Control Module circuit poor electrical connection

How to Fix the DTC U0293 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 U0293 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 U0293 GMC Code

1. What are common symptoms of OBDII code U0293 GMC?

- Common symptoms include the hybrid/EV system not functioning properly, loss of power, warning lights on the dashboard, and the vehicle going into limp mode.

2. What causes the OBDII code U0293 GMC to appear?

- This code is triggered when the vehicle's onboard computer detects a communication failure with the hybrid/EV powertrain control module.

3. How can I diagnose the issue related to code U0293 GMC?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific codes, checking for any loose or damaged wiring connections, and testing the powertrain control module for faults.

4. Can a DIY enthusiast repair OBDII code U0293 GMC?

- While some basic troubleshooting like checking connections can be done by DIY enthusiasts, diagnosing and repairing communication issues with the powertrain control module may require professional tools and expertise.

5. Is it safe to drive with the U0293 GMC code present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid/EV system and potentially unsafe driving conditions.

6. How much does it typically cost to repair OBDII code U0293 GMC?

- The cost of repairing this code can vary depending on the root cause of the communication failure and the labor rates of the repair shop. It's advisable to get a few quotes from different mechanics.

7. Are there any common repair tips for resolving U0293 GMC code?

- Some common repair tips include checking and repairing any damaged wiring, ensuring all connections are secure, and updating the powertrain control module software if needed.

8. Can extreme weather conditions cause the U0293 GMC code to appear?

- Yes, extreme weather conditions such as excessive heat or cold can sometimes lead to communication issues with the powertrain control module, triggering the U0293 code.

9. How long does it typically take to repair the U0293 GMC code?

- The repair time can vary depending on the complexity of the issue. Simple fixes like reconnecting a loose wire may take less than an hour, while more involved repairs could take several hours or even days.

10. Is it possible for the U0293 code to reappear after being repaired?

- In some cases, if the root cause of the communication failure is not fully addressed or if there are underlying issues with the powertrain control module, the U0293 code may reappear. Regular maintenance and monitoring can help prevent this.