Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B2805, RFA Programming/Diagnostic Mode Message Not Received: Notes
BCM can enable transmitter programming/diagnostic mode of receiver. BCM will detect and prevent any message collisions on Remote Function Actuator (RFA) link. BCM also receives programming signals from Remote Control Door Lock Receiver (RCDLR) when attempting to enable transmitter programming/diagnostic mode..
DTC B2805 will set when BCM expects to receive a program signal from RCDLR, and it does not after 2 unsuccessful tries. No driver warning message will be displayed. RCDLR will not enter transmitter programming/diagnostic mode.
Under all conditions, ignition switch must be cycled from OFF to RUN position for current DTC B2805 to change to a history code. If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B2805 will also clear when scan tool is used to clear codes.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.