Engine-Codes - Generic - B1866

B1866 Code - Battery Power Supply ECU Circuit Short To Battery

- Code Popularity: 7,329 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the Code B1866?

  • 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 to Fix the B1866 Code?

Start by checking 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.

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What is the Cost to Diagnose the Code B1866?

Labor: 1.0

The cost to diagnose the B1866 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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What are Code B1866 Possible Symptoms?

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

What Does the B1866 Code Mean?

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.

B1866 Code - Battery Power Supply ECU Circuit Short To Battery

Need more Information on the B1866 Code?

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Code B1866 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

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