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U3018 Code - Control Module Supply Circuit 1-2 Not Plausible

- Code Popularity: 1,327 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Jun 18, 2020
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|U3018 code possible causes

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

|How do I fix code U3018 code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing U3018 code

Labor: 1.0

The cost of diagnosing the U3018 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are U3018 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|U3018 code 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 U3018 - Control Module Supply Circuit 1-2 Not Plausible - AutoCodes.com
U3018 Code - Control Module Supply Circuit 1-2 Not Plausible

|Need more information with the U3018 code?

Need more information on how to fix the U3018 code?
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|Information for specific makes

  • U3018 BUICK Control Module Supply Circuit 1-2 Not Plausible
  • U3018 CADILLAC Control Module Supply Circuit 1-2 Not Plausible
  • U3018 CHEVROLET Control Module Supply Circuit 1-2 Not Plausible
  • U3018 GMC Control Module Supply Circuit 1-2 Not Plausible

|Need help with a U3018 code?

Get the U3018 code diagnosed by a professional: Find a repair shop in your area

|U3018 code comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U3018 code? Have you replaced any parts?
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