What is the issue with the Corolla B2799 trouble code?

1 Answers
SanDylan
07/29/25 7:48pm
Corolla trouble code B2799 is related to the engine immobilizer system. Possible causes: The anti-theft chip signal from the key cannot be received by the anti-theft computer, which may be due to a malfunction in the ECM, transponder key ECU, or wiring harness. Solutions: Check whether the original key is damaged; read the trouble codes from the engine immobilizer system's wiring to help inspect the relevant parts of the system; use the TOYOTA Intelligent Tester (Toyota's intelligent handheld tester) for fault diagnosis, or directly short-circuit pins 4 and 13 of the diagnostic interface to start the engine.
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