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 PZ2470, Daytime Running Lights Fault: Notes
Daytime Running Lights (DRL) are commanded on and off by PZM through DRL relay. DRL are activated when ignition switch is in RUN or START position, twilight sentinel is not active, headlights and fog lights are off, and transmission is not in Park. When DRL relay is energized, high beams are placed in a series circuit which provides lower illumination for DRL.
A short to ground will be tested when ignition switch is in ON position, DRL are inactive, and IPC verifies vehicle is equipped with DRL. A short to battery will be tested when ignition switch is in OFF position, DRL are active, and IPC verifies vehicle is equipped with DRL.
DTC PZ2470 will set when commanded state of DRL does not match feedback state. When DTC PZ2470 is set, PZM will continue to command state requested until it is achieved or changes. DTC PZ2470 will clear when commanded state matches feedback state for 2 consecutive monitoring cycles.
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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.