Guide to Warning Signs on your Volkswagen Vehicle
Did a warning light appear on your Volkswagen dashboard, and you’re not sure what it means? Don’t worry – we’ve got you covered. Below is a list of common warning signs, their meanings, and helpful advice on what to do when they appear. Our goal is to keep you informed and prepared, so you can address any issue quickly and keep your VW running at its best.
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Check Engine Light
What it means: Signals an issue with the engine or emissions system.
Why it happens: Loose gas cap, faulty oxygen sensor, catalytic converter issue, misfire, or MAF (Mass Air Flow) sensor problem.
Action to take: If steady, check for minor issues like a loose gas cap. If flashing, stop driving as it could indicate a serious engine misfire.
What it means: Relates to the engine management system, including throttle, sensors, or traction control.
Why it happens: Faulty throttle body, brake light switch failure, or wiring issues.
Action to take: Safe to drive temporarily, but seek diagnosis soon.
Oil Pressure Warning Light
What it means: Indicates low oil pressure.
Why it happens: Low oil level, faulty oil pump, or oil pressure sensor.
Action to take: Stop the vehicle immediately and check the oil level. Do not drive if the issue continues.
Coolant Temperature Warning Light
What it means: Signals that the engine is overheating (red) or the coolant is too cold (blue).
Why it happens: Low coolant level, thermostat failure, or radiator issue.
Action to take: Stop driving if red; let the engine cool down. Add coolant if low.
Glow Plug Warning Light (Diesel Models)
What it means: Signals that there is a malfunction with the glow plugs or preheating system.
Why it happens: Faulty glow plugs, relay, or wiring issues.
Action to take: If flashing, it may indicate engine misfires or injector issues. Get it checked soon.
Battery Warning Light
What it means: Indicates an issue with the charging system.
Why it happens: Failing alternator, dead battery, or loose wiring.
Action to take: Stop driving if it stays on and check the alternator and battery.
ABS Warning Light
What it means: Indicates a fault in the Anti-lock Braking System.
Why it happens: Faulty ABS sensor, module, or wiring.
Action to take: Brakes will still function but without ABS capabilities. Seek service.
Brake System Warning Light
What it means: Low brake fluid or a more serious braking issue.
Why it happens: Low brake fluid, worn brake pads, or hydraulic issues.
Action to take: Stop driving immediately and inspect the brakes.
Tire Pressure Monitoring System (TPMS)
What it means: One or more tires may be underinflated.
Why it happens: Low tire pressure, faulty TPMS sensor.
Action to take: Check tire pressure and inflate to recommended levels.
Diesel Particulate Filter (DPF) Warning Light (Diesel Models)
What it means: Indicates the diesel particulate filter is clogged.
Why it happens: Frequent short trips or insufficient regeneration.
Action to take: Drive at highway speeds to allow regeneration. If unresolved, service is needed.
AdBlue Warning Light (Diesel Models)
What it means: The AdBlue tank needs to be refilled or the AdBlue system malfunctioned.
Why it happens: Faulty pump or sensor.
Action to take: Refill AdBlue as soon as possible. The car may not start if it runs out completely.
Steering Wheel Warning Light
What it means: Issue with the power steering system.
Why it happens: Low power steering fluid or electronic failure.
Action to take: Yellow means limited assistance; red means no assistance. Seek service.
Airbag Warning Light
What it means: Fault in the airbag system.
Why it happens: Faulty sensors, seatbelt issues, wiring or battery issues, or recent accidents.
Action to take: Airbags may not deploy in an accident. Get it checked immediately.
If any of these lights listed above appear on your dashboard, be sure to bring your vehicle to Owasco Volkswagen and we will help get your Volkswagen running like new again.