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 42: Remote Transmitter Not Assigned To Body Control Module: Description
Digital Radio Frequency (RF) message received was from a remote transmitter not programmed to Body Control Module (BCM). Remote transmitter function capabilities will not exist. DTC 42 will set when remote transmitter was used without programming it to BCM. If remote transmitter was already programmed, remote transmitter may be defective. DTC 42 will also set if another remote transmitter was operated in same area. BCM should be placed in Remote Keyless Entry (RKE) system programming mode. All remote transmitters must be programmed to BCM during same programming mode cycle. See REMOTE TRANSMITTER under PROGRAMMING.
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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.
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