AutoCodes – Generic – U0599

U0599 Code - Invalid Data Received From DC To DC Converter Control Module 'A'

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 DC To DC Converter Control Module 'A', DC To DC Converter Control Module 'A' harness is open or shorted, DC To DC Converter Control Module 'A' 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: U0599 indicates Invalid Data Received From DC To DC Converter Control Module 'A'.
Common causes: Common causes include Faulty DC To DC Converter Control Module 'A', DC To DC Converter Control Module 'A' harness is open or shorted, DC To DC Converter Control Module 'A' 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 7,423

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 U0599 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 DC To DC Converter Control Module 'A' causing its integrity to be questioned.

OBDII Code U0599 - Invalid Data Received From DC To DC Converter Control Module 'A' - AutoCodes.com — U0599 Code - Invalid Data Received From DC To DC Converter Control Module 'A'

What does this mean?

What are the Possible Causes of the DTC U0599?

Faulty DC To DC Converter Control Module 'A'
DC To DC Converter Control Module 'A' harness is open or shorted
DC To DC Converter Control Module 'A' circuit poor electrical connection

How to Fix the DTC U0599?

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 U0599 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 U0599 code?

Need more information on how to fix the U0599 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0599 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0599 Chrysler — Invalid Data Received From DC To DC Converter Control Module 'A'
U0599 Dodge — Invalid Data Received From DC To DC Converter Control Module 'A'
U0599 Jeep — Invalid Data Received From DC To DC Converter Control Module 'A'
U0599 RAM — Invalid Data Received From DC To DC Converter Control Module 'A'

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 U0599 Code

1. What does the OBDII code U0599 mean?

U0599 indicates that the vehicle's control modules have received invalid or corrupted data from the DC to DC Converter Control Module 'A'.

2. What are the common symptoms of code U0599?

Symptoms may include illuminated warning lights (e.g., check engine light or battery light), charging system issues, reduced electrical performance, or power loss in hybrid or EV systems.

3. What causes the U0599 code to appear?

Common causes include a faulty DC to DC converter control module, wiring or connector issues, software glitches, or interference from other electrical components.

4. Can a weak battery trigger the U0599 code?

Yes, a weak or failing 12-volt battery can cause communication errors, potentially triggering the U0599 code.

5. How do I diagnose the U0599 code?

Perform a visual inspection of the wiring and connectors, check for additional codes, test the DC to DC converter module, and ensure the vehicle's battery and charging system are functioning properly.

6. Is it safe to drive with the U0599 code?

Driving may be possible, but it’s not recommended as the issue could lead to electrical system failures or reduced performance, especially in hybrid or electric vehicles.

7. How is the U0599 code fixed?

Repairs may involve replacing or reprogramming the DC to DC converter control module, repairing damaged wiring or connectors, or updating the vehicle’s software.

8. Can a software update resolve the U0599 code?

In some cases, a software update from the manufacturer can address data communication issues and resolve the code.

9. What tools are needed to troubleshoot the U0599 code?

A professional-grade OBDII scanner, a multimeter for electrical testing, and access to the vehicle’s wiring diagrams are typically required.

10. Does the U0599 code only affect hybrid or electric vehicles?

While it’s more common in hybrid and electric vehicles due to their reliance on DC to DC converters, it can also appear in other vehicles with advanced electrical systems.