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 B2588: ALC Parking Light Relay Output Short To Battery: Description
DTC B2588 indicates that ALC parking light relay output is shorted to battery. DTC B2588 will set when ignition switch is turned to RUN position, ALC option is enabled, ALC parking light output is active, and ALC parking light feedback does not exist for one second.
When DTC B2588 is set, ALC parking lights will turn off. DTC B2588 can be cleared when fault state is exited when status of ALC parking lights returns to OFF. DTC B2588 can also be cleared using scan tool, or history DTC will disappear after 100 ignition cycles if fault conditions do not reoccur.
DTC B2588 indicates that ALC parking light relay output is shorted to battery. DTC B2588 will set when ignition switch is turned to RUN position, ALC option is enabled, ALC parking light output is active, and ALC parking light feedback does not exist for one second.
When DTC B2588 is set, ALC parking lights will turn off. DTC B2588 can be cleared when fault state is exited when status of ALC parking lights returns to OFF. DTC B2588 can also be cleared using scan tool, or history DTC will disappear after 100 ignition cycles if fault conditions do not reoccur.
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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.