When the spark plugs and wires are faulty, you’ll notice a decline in your car’s performance, engine misfire, poor fuel economy, or even a declining throttle response.įailure to address these warning signs can lead to the damage of expensive car parts such as the catalytic converter. Without them, the fuel and air mixture in the cylinders can’t ignite. Spark plug wires transfer electricity from the coil to the spark plug. Spark plugs and wires should be replaced after a few years of use or when you hit about 10,000 miles. Related: Car Warning Lights Resource Centre Faulty Spark Plugs and Wires Ultimately, the check engine light will come on. If you hear unusual sounds while driving or observe discoloured smoke from the exhaust, then your catalytic converter is most likely failing. Also, drive your car on the highway as often as is convenient to prevent clogging the catalytic converter. To prevent your catalytic converter from failing, observe regular car maintenance. Failed Catalytic ConverterĪ catalytic converter is a simple yet costly part of the exhaust system that converts carbon monoxide into carbon dioxide in the combustion chamber Keep reading to discover these common check engine light issues. Which means you can make timely repairs and avoid unnecessary expenses. It checks your car and reports on over 300 common car issues – In. However, it could also mean that your catalytic converter is faulty (expensive to repair), or the oxygen sensors are broken, among other car issues.Ĭorrectly identifying these car issues is crucial. And often confused about your next course of action.Ĭould be a loose gas cap triggering on the check engine light – easy fix. Fact: When the check engine light comes on it spells bad news.

Peugeot 107 engine warning light