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B2784 Toyota Code - Antenna Coil Open / Short

- Code Popularity: 47,793 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B2784 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.
    With Smart Key System
  • Faulty Engine Switch
  • Engine Switch harness is open or shorted
  • Engine Switch circuit poor electrical connection
  • Faulty Certification ECU (Smart Key ECU Assembly)
    Without Smart Key System
  • Faulty Transponder Key Coil
  • Transponder Key Coil harness is open or shorted
  • Transponder Key Coil circuit poor electrical connection
  • Faulty Transponder Key ECU Assembly
⚠ Does your Toyota have Safety Recalls? → Check here

How to Fix the DTC B2784 Toyota?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2784 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B2784 Toyota Description

When an open or short circuit is detected in the Transponder Key Amplifier Coil built into the Engine Switch, the Certification ECU (Smart Key ECU Assembly) stores this Diagnostic Trouble Code (DTC). This DTC is also stored as a past DTC.
For vehicles without Smart Key System, when an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC.

OBDII Code B2784 Toyota - Antenna Coil Open / Short - AutoCodes.com
B2784 Toyota Code - Antenna Coil Open / Short

Need More Information on the Code?

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Code B2784 Toyota comments

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