P0403 Code (Symptoms, Causes, and How to Fix)

P0403 code

When you start up your vehicle the last thing you want to see is a check engine light. But if you own a vehicle long enough, eventually it’s going to happen. Once you read the code it’s time to go about fixing the underlying problem. But what exactly does a code P0403 mean, and how … Read more

P0400 Code (Symptoms, Causes, and How to Fix)

P0400 code

Though life is full of uncertainties, one fact that we can be sure of is that our vehicles, no matter how well maintained they are, will experience the occasional mechanical issue. For most, such issues tend to arise when least expected, especially when we already find ourselves juggling extremely busy schedules. Frustrated to no end, … Read more

P0405 Code (Symptoms, Causes, and How to Fix)

P0405 code

During the 1970s, a revolution of sorts took place within the automotive industry. Newly implemented emissions standards of the day placed increasing pressure upon US automakers to reduce their carbon footprint. However, accomplishing this proved quite difficult, and ultimately necessitated the introduction of new emissions control devices. While outwardly robust by design, these new components … Read more

P0401 Code (Symptoms, Causes, and How to Fix)

P0401 code

During the late 1970s, the automotive world underwent a series of rather monumental changes. A new found consciousness for environmental-related concerns led to a flurry of legislation aimed at curbing the output of exhaust-born pollutants.  This agenda ultimately led to the mandate of new emissions equipment, aimed at cleaning up engine exhaust. Of these components, … Read more

P0402 Code (Symptoms, Causes, and How to Fix)

P0402 code

Few vehicle-related issues can be quite as maddening as the sudden illumination of a check engine light. Issues of this type arise for a number of reasons, though the vast majority relate to operational or emissions failures. In essence, the onset of a check engine light is a vehicle’s way of calling attention to an … Read more

P0404 Code (Symptoms, Cause, and How to Fix)

P0404 engine code

The exhaust gas regulation (EGR) system enables cars to reduce smog emissions. Besides limiting smog emissions, the EGR is also responsible for controlling the engine temperature as well as the ratio of fuel-to-air. Any component failure in this system can activate the P0404 code. When troubleshooting the P0404 code, it is crucial to be thorough … Read more