If your check engine light flashes on, you don’t need to assume that your engine is nearing a total catastrophe. However, you should promptly get to the shop for computerized diagnostics so that the developing problem can be identified and addressed before it escalates and causes bigger trouble. At Hye-Tech Auto, our local mechanics provide expert check engine light diagnostics and repair in the greater Covina, CA area. Here’s a look at six common reasons that the check engine light illuminates. 

Faulty Catalytic Converter

To ensure that your vehicle is minimally polluting, you need a healthy catalytic converter. Symptoms of catalytic converter trouble include darkened exhaust smoke and poor acceleration. With a bad catalytic converter, you may also notice a smell like rotten eggs.

Failing Oxygen Sensor

Oxygen sensors do the important task of monitoring how much unburned oxygen is in the exhaust system. A faulty oxygen sensor may not only trigger the check engine light, it could also lead to catalytic converter problems.

Bad Mass Air Flow Sensor

MAF sensors keep tabs on how much air is coming in and calculate the amount of fuel that should be injected with it. A failing MAF sensor could cause hesitations during acceleration.

Battery/Charging System Issue

A bad battery can cause low voltage at the computer, which may then cause the check engine light to turn on. 

Loose/Missing Gas Cap

While it might sound strange, a loose or missing gas cap sometimes triggers the check engine light. A poorly-fitting gas cap may also allow gas to evaporate before you get the chance to run on it.

Bad Ignition Coil

To reliably create the spark your engine needs to come roaring to life, you need healthy ignition coils. An ignition coil issue could cause misfiring. Bad spark plugs may also cause misfiring, and are another potential check engine light trigger.

Check Engine Light Repair in Covina, CA

When you need auto repair in Covina and the surrounding area, contact Hye-Tech Auto at 626-332-5452. At our local auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call today to schedule an appointment!