AutoCodes – GMC – U0594 GMC

U0594 GMC Code - Invalid Data Received From Hybrid Powertrain Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Hybrid Powertrain Control Module, Hybrid Powertrain Control Module harness is open or shorted, Hybrid 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: U0594 GMC indicates Invalid Data Received From Hybrid Powertrain Control Module.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module, Hybrid Powertrain Control Module harness is open or shorted, Hybrid 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 552

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0594 GMC Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Hybrid Powertrain Control Module causing its integrity to be questioned.

OBDII Code U0594 GMC - Invalid Data Received From Hybrid Powertrain Control Module - AutoCodes.com — U0594 GMC Code - Invalid Data Received From Hybrid Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U0594 GMC?

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

How to Fix the DTC U0594 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 U0594 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 U0594 GMC Code

1. What are common symptoms of OBDII code U0594 in a GMC vehicle?

- Common symptoms include poor engine performance, reduced fuel efficiency, and potential stalling or hesitation while driving.

2. What does the OBDII code U0594 in a GMC indicate?

- The code U0594 indicates that the ECM has detected invalid data coming from the Hybrid Powertrain Control Module in the vehicle.

3. What are possible causes of the U0594 code in a GMC?

- Possible causes include a faulty Hybrid Powertrain Control Module, wiring issues, software glitches, or communication errors between control modules.

4. How can I diagnose the U0594 code in my GMC?

- Diagnosing the U0594 code typically involves using a scan tool to retrieve the code, checking the wiring and connections, and testing the Hybrid Powertrain Control Module for proper function.

5. Is it safe to continue driving with the U0594 code present in my GMC?

- It is not recommended to continue driving with the U0594 code present, as it can lead to further damage to the vehicle's hybrid powertrain system and potentially unsafe driving conditions.

6. Can I reset the U0594 code in my GMC by disconnecting the battery?

- Disconnecting the battery may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the U0594 code in a GMC?

- The cost of repairing the U0594 code can vary depending on the exact cause of the issue, but it may involve replacing the Hybrid Powertrain Control Module or addressing wiring and communication issues.

8. Are there any common DIY repair tips for the U0594 code in a GMC?

- DIY repair tips may include checking and securing wiring connections, ensuring proper grounding, and consulting the vehicle's service manual for specific troubleshooting steps.

9. Can a mechanic help me fix the U0594 code in my GMC, or do I need to visit a dealership?

- A qualified mechanic should be able to diagnose and repair the U0594 code in your GMC, but visiting a dealership with specialized knowledge of hybrid powertrain systems may also be beneficial.

10. How long does it typically take to repair the U0594 code in a GMC?

- The repair time for the U0594 code can vary depending on the exact cause and complexity of the issue, but it may take a few hours to a full day to diagnose and fix the problem.