B15A8: Telematics Transceiver Malfunction
2 vehicles · 1 makes
Most Reported On
B15A8 is an OBD-II diagnostic trouble code meaning “Telematics Transceiver Malfunction.” Set by the Data Communication Module (DCM, the telematics transceiver) when its power-on self-check finds an internal error in the EEPROM (which stores the data needed to operate the Safety Connect system) or in the PLL IC (which oscillates the cellular radio frequency). It is an internal-module fault, not a wiring-continuity fault, though a poor connection at the DCM connector can also set it. Toyota has documented that this DTC can be stored during manufacturing and shipping without indicating any real vehicle defect. This code is most commonly reported on 2020-2021 Toyota Camry, and 2020-2021 Toyota RAV4 (RAV4, RAV4 Hybrid).
Common Causes
Diagnostic Tools
B15A8 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does B15A8 mean?
B15A8 stands for "Telematics Transceiver Malfunction." Set by the Data Communication Module (DCM, the telematics transceiver) when its power-on self-check finds an internal error in the EEPROM (which stores the data needed to operate the Safety Connect system) or in the PLL IC (which oscillates the cellular radio frequency). It is an internal-module fault, not a wiring-continuity fault, though a poor connection at the DCM connector can also set it. Toyota has documented that this DTC can be stored during manufacturing and shipping without indicating any real vehicle defect.
What are the most common causes of B15A8?
The most common causes of B15A8 are: Internal EEPROM or PLL IC failure inside the DCM / telematics transceiver, Poor electrical connection or corrosion at the DCM connector, DCM firmware fault (including the DCM firmware that keeps the module awake and drains the 12V battery), Code stored during vehicle manufacture or shipping with no actual fault present. The specific cause varies by vehicle.
How much does it cost to fix B15A8?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B15A8?
Au7o has documented B15A8 across 2 vehicle models from 1 manufacturers: Toyota.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.