Communication Condition Failure Between ECM
Table of contents
B2791 TOYOTA Possible Causes
- Faulty ID Code Box
- ID Code Box harness is open or shorted
- ID Code Box circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code B2791 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 B2791 TOYOTA code
The cost of diagnosing the B2791 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)
B2791 TOYOTA Description
This Diagnostic Trouble Code (DTC) is output when the ID Code Box does not respond to a verification request signal from the Engine Control Module (ECM).