Affordable Auto Service - 952-933-0735 HOURS Affordable Auto Service - 952-933-0735 MAP Professional Auto Repair, Maintenance & Customization Services

The 4 Most Common Car Diagnostic Codes

Diagnostic Codes for CarsSince the teams competing in the Final Four and the Frozen Four (Go Gophers!) have been determined, we thought we’d stick with the theme and come up with a list of four on our own. Behold, the four most common car diagnostic codes!

Oxygen Sensor Codes – As we made mention in last week’s post about crazy car facts, the most common car problem is a faulty oxygen sensor, so it makes sense that sensor issues top the list of common diagnostic codes. If your oxygen sensor isn’t working properly, you’ll likely notice a dip in gas mileage or your car will randomly stall, neither of which are good. Get your oxygen sensor fixed before it causes bigger problems.

Engine Misfire Codes – An engine misfire code is another common code that mechanics deal with on a daily basis. If your engine is misfiring, one or more of the cylinders isn’t working properly. Not only will this impact fuel efficiency, but you’ll also likely notice that your car vibrates a bit. You never want to ignore an engine issue, so if you notice that your car shakes while idol, swing on into a service center.

Evaporative System Codes – The evaporation system is another important part of your car. The evaporation system is responsible for containing and removing vapors that are produced when fuel is burned. It’s a pretty complex problem that can be disrupted by the simplest things, like a loose gas cap. If a diagnostic test reveals an evaporation code error, try tightening the gas cap. If that doesn’t work, you’ll need to let a mechanic take a closer look.

EGR Codes – EGR stands for Exhaust Gas Recirculation, and its purpose is to control the engine’s emission of smog-causing nitrous oxides. The vehicle’s computer system controls the EGR system by opening and closing valves as needed. EGR problems can occur if you don’t regularly have your oil changed, or if you take a lot of short trips with your car. These quick trips don’t give your car enough time to adequately warm up, which can cause carbon buildup. Left unchecked, a problemed EGR system can cause major engine issues.

Related source: Bumper to Bumper Radio, KTAR 92.3FM in Phoenix


  • Car Ownership Costs: A State-by-State Comparison
    Aug 14, 2014

    A new study of car ownership by researchers at Bankrate.com found that it’s cheaper to own a car in Minnesota than the national average, but just barely. The study found that Minnesota ranked 21st in terms of annual cost of ownership, coming in just $38 south of Indiana, the 25th ranked state. To determine the total […]

  • 5 Tips for Choosing the Right Auto Repair Shop
    Sep 6, 2013

    When your car needs work, two things come to mind. You want someone who will get the repair done quickly, and most importantly, someone who won’t overcharge you for the work. But how do you know which auto repair shops are honest and which ones want to take you for a ride? Below we share […]

  • Reporting Potholes in Minnesota
    Mar 12, 2014

    As we noted last week, potholes can cause major damage to your car. Now that temperatures are on the rise, you’ve no doubt encountered a swarm of potholes during one of your commutes. Hopefully you’ve been able to avoid the big potholes, but that wasn’t the case for one Minnesotan whose airbags deployed when he […]