Engine-Codes - Toyota - B278C Toyota

B278C Toyota Code - Lost Communication With Power Source Control

- Code Popularity: 3,655 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B278C Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Power Management Control ECU
  • Power Management Control ECU harness is open or shorted
  • Power Management Control ECU circuit poor electrical connection
  • Faulty Certification ECU (Smart Key ECU Assembly)
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How to Fix the DTC B278C Toyota?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B278C Toyota code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the B278C Toyota Code Mean?

This Diagnostic Trouble Code (DTC) is stored when Local Interconnect Network (LIN) communication between the Certification ECU (Smart Key ECU Assembly) and Power Management Control ECU stops for 10 seconds or more.

B278C Toyota Code - Lost Communication With Power Source Control

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