Mercedes Benz CLA Fault Codes

About the CLA

The CLA was first released in 2013 as a series of compact luxury cars. Both a 4-door sedan and a 5-door station wagon, called the Shooting Brake, have been sold.

Like with many of the Mercedes-Benz offerings, it is sold as a performance version as well. This is called the CLA 45 AMG Edition. There have been a number of other variants sold over the years. There have also been two generations to hit the markets since its release.

Competition comes mainly from Mercedes-Benz’s main rivals, the Audi TT Coupe and BMW 2 Series. Another similar model is the Volkswagen Arteon.

To provide the desired performance, all CLA models, both diesel and petrol, are outfitted with turbocharger systems.

This is one of the main issues that owners have reported for the model. Fault code P0299 represents an underboost condition from the turbocharger. Loose hoses in the turbocharger system, a faulty boost pressure sensor, and a defective wastegate actuator have all been attributed to being the cause for this issue.

Another fairly common issue for the model is P0301, which represents a misfire from the first cylinder.

Lack of proper maintenance is one of the primary causes for misfires in Mercedes engines. Fouled spark plugs can easily be replaced, fixing the issue though. However, anything that can upset the ideal air-fuel mixture or the ignition source for cylinder one can be the cause of a misfire.

Unfortunately, both of these codes are fairly serious problems. They can cause significant issues when it comes to performance, such as putting the CLA into limp mode. In some cases, the symptoms will be very mild, but it is still best to have these codes resolved as soon as possible to protect the car.