AutoCodes – Chevrolet – U350B Chevrolet

U350B Chevrolet Code - Control Module Input Power 'C' Circuit Intermittent/Erratic

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, 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
U350B Chevrolet indicates Control Module Input Power 'C' Circuit Intermittent/Erratic.
Common causes
Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 786
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 18, 2020
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Code U350B Chevrolet Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. With the ignition is ON, the Diagnostic Trouble Code (DTC) will set when the control module or sensor detects a system voltage of less than approximately 9 V for approximately 5 s.
OBDII Code U350B Chevrolet - Control Module Input Power 'C' Circuit Intermittent/Erratic - AutoCodes.com
U350B Chevrolet Code - Control Module Input Power 'C' Circuit Intermittent/Erratic

What are the Possible Causes of the DTC U350B Chevrolet?

  • Faulty Control Module setting the code
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC U350B Chevrolet?

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 U350B Chevrolet 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 U350B Chevrolet code?

Need more information on how to fix the U350B Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U350B Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 U350B Chevrolet Code

1. What are the common symptoms of OBDII code U350B in a Chevrolet vehicle?

- Common symptoms include intermittent or erratic operation of various electronic components, such as dashboard lights, power windows, or the radio.

2. What are the potential causes of OBDII code U350B in a Chevrolet?

- The code U350B can be triggered by issues with the wiring harness, loose connections, a faulty control module, or a weak power source.

3. How can I diagnose the Control Module Input Power 'C' Circuit issue in my Chevrolet?

- Use a diagnostic scanner to retrieve the specific code (U350B) and inspect the wiring and connections related to the 'C' power circuit for any signs of damage or looseness.

4. Can a weak battery or alternator cause the OBDII code U350B to appear in a Chevrolet?

- Yes, a weak battery or alternator can lead to voltage fluctuations in the 'C' power circuit, triggering the U350B code. Ensure your vehicle's electrical system is in good condition.

5. What are some repair tips for addressing the Control Module Input Power 'C' Circuit Intermittent/Erratic issue in a Chevrolet?

- Start by checking and securing all wiring connections, inspecting the wiring harness for damage, and testing the control module's functionality. Consider replacing any faulty components.

6. Is it safe to continue driving my Chevrolet with the U350B code present?

- It is not recommended to drive your vehicle with the U350B code active, as it may lead to erratic behavior of crucial electronic systems, potentially compromising safety and performance.

7. Can a DIY enthusiast fix the U350B code issue in a Chevrolet, or is professional assistance required?

- Depending on your experience and tools, simple tasks like checking connections and inspecting wiring can be done at home. However, for complex repairs or component replacements, professional help may be needed.

8. How much can I expect to pay for repairing the Control Module Input Power 'C' Circuit issue in a Chevrolet?

- The cost of repairing the U350B code can vary based on the underlying cause and the extent of the damage. It is advisable to consult with a trusted mechanic for an accurate estimate.

9. Will resetting the OBDII code U350B in my Chevrolet make it go away permanently?

- Resetting the code may temporarily clear the error, but if the root cause is not addressed, the issue is likely to reoccur. It is crucial to diagnose and fix the underlying problem to prevent future instances.

10. Are there any recalls or technical service bulletins related to the U350B code for Chevrolet vehicles?

- It is recommended to check with Chevrolet dealership or online resources for any recalls or technical service bulletins specifically addressing the U350B code to stay informed about potential solutions or known issues.

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