How to Read Dashboard Warning Lights

Dashboard warning lights are your car's way of telling you something needs attention. Most drivers know the check engine light, but many of the other symbols — particularly those related to braking, battery or tyre pressure — are misunderstood or ignored. That is a risk that compounds over time, especially in a climate like Vancouver's where cold weather and road salt create conditions that stress car systems harder than most drivers expect.

What the Colours Mean

Warning lights come in three colours: red, amber and green. Red means stop driving immediately and do not continue — a red warning light is a safety issue. Amber means attention is needed but you can continue to a safe location or a workshop. Green and blue mean a system is active and functioning normally.

In a city like Vancouver, where cold mornings are common from October through March, amber warning lights appearing in cold weather are worth noting carefully. Cold temperatures affect tyre pressure, battery output and various sensors — some amber lights that appear in cold weather will clear once the car warms up, but others indicate a real issue that needs attention.

Check Engine Light

The check engine light — a shape resembling an engine — is the most frequently misunderstood warning. It can indicate anything from a loose fuel cap to a failing sensor to a misfire. In Vancouver's climate, a check engine light that appears during cold starts and clears after the car warms up often points to an oxygen sensor issue, which is common in vehicles with high mileage in cold climates.

If the check engine light is flashing rather than solid, reduce speed immediately and seek a workshop — a flashing check engine light indicates a misfire that can damage the catalytic converter. Continuing to drive with a flashing light can result in costly damage that goes beyond the original fault.

Tyre Pressure Warning

The tyre pressure warning light — a circle with an exclamation mark inside — is one of the most common warnings in Vancouver's climate. Tyre pressure drops in cold weather, roughly 0.1 bar per 5 degrees Celsius of temperature drop. A tyre pressure warning that appears on a cold Vancouver morning may clear once the tyres warm up from driving.

Check tyre pressure with a gauge when the tyres are cold, not after driving. Compare against the vehicle manufacturer's recommended tyre pressure, which is on the sticker inside the driver's door frame — not the number on the tyre sidewall. If the light stays on after inflating to the correct pressure, have the system inspected.

Battery and Charging System

A battery-shaped light — red or amber depending on the vehicle — indicates a problem with the charging system. In Vancouver's winter, batteries are already under additional load from cold starts. A battery warning that appears after a cold start and stays on while driving indicates the alternator is not charging the battery properly.

Short trips are particularly hard on batteries in Vancouver's climate. A car driven only for 10-15 minutes at a time does not fully recharge the battery after cold-start demand. If your car is primarily used for short trips and you see a battery warning, a longer drive to fully recharge or a battery test at a shop is worth doing before the battery fails completely.

Brake System Warning

A brake warning light — usually an exclamation mark inside a circle or the word BRAKE — should always be taken seriously. On most vehicles it illuminates when the parking brake is engaged. If it is on with the parking brake released, it can indicate low brake fluid, worn brake pads, or a fault in the ABS system.

In wet Vancouver weather, brake performance is already reduced compared to dry conditions. A brake warning that appears during wet weather driving, or after the car has been driven through standing water, should be inspected before continuing to drive in wet conditions.

Coolant Temperature Warning

A thermometer icon in a tank of water means the engine is running hot. In Vancouver's climate this is less common than in hotter cities, but it can occur during sustained high-speed driving on the highway in summer, or if the coolant level is low. If this light comes on, pull over safely, turn off the engine and do not continue driving. Continuing with an overheating engine can result in head gasket failure, which is a major repair.

When to Seek Help

If a red warning light appears, stop driving immediately and seek assistance. If an amber light stays on after a 10-minute drive and does not clear on its own, book a diagnostic inspection. Many automotive shops in Vancouver offer same-day or next-day diagnostic appointments.

JRS Auto Customs can advise on warning light diagnostics and repair when you bring your car in. If you are unsure what a warning light means, photograph it and note the driving conditions — cold start, highway driving, city traffic — when it appeared. That information helps a technician diagnose the issue faster.

For ongoing maintenance and inspection needs, book a visit with JRS Auto Customs to keep on top of any issues your car develops.