Warning Light

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Learn about Warning Light from Wrench

Mobile Warning Light Services at Home or Office

The electronic system in today's cars relies on a series of sensors – these sensors can also tell you if there's something wrong with your car using warning symbols on the dashboard. There are three types of warning lights – red, orange and green. A red warning light suggests that you should act quickly because the problem is serious, such as an overheating engine, low engine oil pressure or a braking system problem. An orange warning light means that the engine management system – the computer that runs the engine – has detected a fault. Green or blue dash lights typically let the driver know of an active system, like headlights or air conditioning. If a red or orange light comes on you should call Wrench mobile mechanic for your car diagnosis and repair as soon as possible. It's important to pay attention to car dashboard warning lights because they can help you avoid a car breakdown, as well as potentially saving you from an expensive repair bill and keeping you safe on the road.

What is Warning Light?

Brake warning light indicates a serious problem with your brakes. Red temperature warning light indicates your engine has overheated. A blue light means the coolant temperature is too low. Red and blue blinking means there is an electrical wiring malfunction. Oil warning light can indicate low pressure. Battery charging system warning light means either a bad battery or a failing alternator. It can all look a bit confusing and a little alarming but don't worry, they only light up to let you know the systems they relate to are working, before going out. The time to worry is when one of them stays on, or comes on when you're driving, indicating there's a problem.

How is a Warning Light Diagnosed?

Depending on the reason for the warning light, our mechanic will work to remedy the issue by replacing parts, repairing damaged parts, rewiring portions of the vehicle, or performing software updates. Check your dashboard gauges and lights for indications of low oil pressure or overheating. These conditions mean you should pull over and shut off the engine as soon as you can find a safe place to do so. On some cars, a yellow check engine light means you need to investigate the problem and a red one means you need to stop right now and contact a Wrench mobile mechanic. The process is not usually a long one, due in part to the information stored by your warning light system. The cost of repairs will depend entirely on what needs to be fixed, how many extra parts are required, and the hours it takes to repair the damage. Fortunately, your mechanic can go over each aspect of the warning, what went wrong, and how to fix it, before diving in.


It is incredibly important to report warning lights that are lit up as soon as they occur because the issue that caused the light to come on will only get worse over time. By avoiding the mechanic and driving your car with warning lights on, you could cause more irreparable damage, and make it more time consuming and costly to repair the vehicle.

Symptoms That Indicate You Need A Warning Light Diagnostic

If a warning light illuminates, it will either blink or remain constantly illuminated, depending on the problem. A blinking light, or in some cars a red light instead of a yellow or orange light, indicates a problem that needs immediate attention. Either way, you should have the vehicle checked by a mechanic. In late-model cars, a blinking light usually indicates an engine misfire so severe that unburned fuel is being dumped into the exhaust system, where it can quickly damage the catalytic converter, leading to an expensive repair. If that happens, you should reduce power and have the car or truck looked at as soon as possible. If the light is steady, the problem is not an emergency, but you should schedule an appointment as soon as possible. Today's automotive computers often try to compensate when there's a problem, so you might not notice deterioration in performance, even though your fuel mileage might be suffering and your vehicle is emitting unacceptable levels of hydrocarbons and other pollutants.

Once your vehicle is repaired, Wrench mobile mechanic will reset the warning light system, and check for any new warnings that may appear before turning your vehicle back over to you. Call for a quote or to book your appointment today!