Identify Dashboard Warning Lights Correctly

Cost Savings

Checklist Tasks

• Photograph the warning light and note if it’s blinking or steady.
• Compare the warning symbol to your manual to avoid confusing similar icons.
• Check for recent battery disconnects or jump starts that may trigger the light.
• Scan the OBD-II port to retrieve any stored trouble codes first.
• Note when the light comes on, such as temperature or driving speed.
• Inspect the fuse box for blown fuses related to the warning circuit.
• Verify aftermarket electronics are grounded to prevent interference.
• Check fluid levels, since sensors may trigger unrelated warning lights.
• Turn the ignition to ‘on’ and verify all dash bulbs illuminate.
• Review for software updates or recalls related to false dash warnings.
• Reset ECU by disconnecting and reconnecting the battery after saving codes.
• Document findings and steps before consulting a professional.