Engine Immobilizer Malfunction
Table of contents
B2799 TOYOTA Possible Causes
- Faulty Key
- Faulty transponder key amplifier
- Faulty Transponder Key Electronic Control Unit (ECU)
- Transponder key amplifier wire harness
- Faulty Engine Control Module (ECM)
How do I fix code B2799 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 B2799 TOYOTA code
The cost of diagnosing the B2799 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.
When is the code detected
– Error in communication between ECM and transponder key ECU assy, and in communication line
– Communication ID is different during communication with transponder key ECU
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B2799 TOYOTA Description
This Diagnostic Trouble Code (DTC) is output when the Engine Control Module (ECM) detects errors in communication between the Transponder Key Electronic Control Unit (ECU) assembly and the ECM, or in the communication lines.
This DTC is also output when an engine start is attempted while the ECU communication ID between the transponder key ECU assembly and the ECM is different.
Before troubleshooting for this DTC, make sure that there is no DTC detected in the transponder key ECU. If there is a key code-related DTC detected in the transponder key ECU assy, repair it first.