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AutoCodes - Generic - B1866

B1866 Code - Battery Power Supply ECU Circuit Short To Battery

- Code Popularity: 6,933 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Jul 07, 2019
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|Code B1866 Possible Causes

  • Faulty Battery Power Supply ECU
  • Battery Power Supply ECU harness is open or shorted
  • Battery Power Supply ECU circuit poor electrical connection
  • Faulty Body Control Module (BCM)

|How do I Fix the Code B1866?

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.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code B1866?

Labor: 1.0

The cost of diagnosing the B1866 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 Code B1866 Possible Symptoms?

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

|Code B1866 Description

The Body Control Module (BCM) monitors the Battery Power Supply ECU. The BCM sets the OBDII code when the Battery Power Supply ECU is not to factory specifications.

OBDII Code B1866 - Battery Power Supply ECU Circuit Short To Battery - AutoCodes.com
B1866 Code - Battery Power Supply ECU Circuit Short To Battery

|Need More Information on the B1866 Code?

Need more information on how to fix the B1866 code? Get Access to Factory Service Manuals

|Information for Specific Makes

  • B1866 Lexus Open In Front Passenger Side Knee Airbag Squib Circuit
  • B1866 Scion Open In Front Passenger Side Knee Airbag Squib Circuit
  • B1866 Toyota Open In Front Passenger Side Knee Airbag Squib Circuit

|Need Help with the B1866 Code?

Get the B1866 code diagnosed by a professional: Find a repair shop in your area

|Code B1866 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 B1866 code? Have you replaced any parts?
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