Short To GND In Immobiliser System Power Source Circuit
Table of contents
B278A TOYOTA Possible Causes
- Faulty Engine switch
- Engine switch harness is open or shorted
- Engine switch circuit poor electrical connection
- Faulty Certification ECU (Smart Key ECU Assembly)
How do I fix code B278A 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’s pins.
Cost of diagnosing the B278A TOYOTA code
The cost of diagnosing the B278A TOYOTA 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B278A TOYOTA Description
This Diagnostic Trouble Code (DTC) is stored when the engine switch power source supply line is open or shorted.