Engine-Codes - Toyota - B279A Toyota

B279A Toyota Code - Theft Deterrent System Communication Line High Fixation

- Code Popularity: 67,376 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 B279A 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 Certification ECU (Smart Key ECU Assembly)
  • Certification ECU harness is open or shorted
  • Certification ECU circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC B279A 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 B279A 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 B279A Toyota Code Mean?

The Diagnostic Trouble Code (DTC) will be set in the Engine Control Module (ECM) when the communication line (IMI - EFIO) between the Engine Control Module and the Certification ECU (Smart Key ECU Assembly) is stuck high.

B279A Toyota Code - Theft Deterrent System Communication Line High Fixation

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