P0171 and P0174 both indicate that there is a lean condition present in your Subaru WRX. By themselves, these are some of the most common OBD2 codes. When they appear together, it indicates that the entire engine is running lean. Definition Both of these codes are generic, which means they have the same meaning … Read more
Your Subaru WRX’s clutch provides a direct connection between the engine and transmission. Without it, it can’t move at all. This connection requires a tremendous amount of pressure. This guide is intended to help you determine why your clutch is slipping on the flywheel. Note: This article is for manual cars only. Here’s the automatic … Read more
A sputtering engine can indicate a number of problems. If your Subaru WRX has a sputter, it is most likely going to be caused by bad fuel system, ignition system, MAF sensor, or bad catalytic converter. Your WRX’s engine is a giant pump. It pulls in air (where it is measured by the mass airflow … Read more
P0037 is a generic OBD II trouble code, which means that it has the same meaning for the Subaru WRX as it would for any other car or truck. Diagnosing this code is relatively straightforward. It is usually caused by a bad oxygen sensor, or a wiring issue. This code is closely related to P0031 … Read more
The single most important safety feature in your Subaru WRX is a good set of brakes. If your brake pedal is going to the floor, it indicates that there is a serious problem in the braking system. When the pedal goes to the floor, it’s usually caused by a bad master cylinder, leaking brakes, bad … Read more
One of the most common automatic transmission problems is shifting hard. If your Subaru WRX has a hard shifting transmission, it can be uncomfortable to drive and a sign of serious problems. If your car’s transmission is shifting hard, it can cause a harsh ride and lead to potential damage over time. Numerous factors can … Read more
Rotors are metal discs that are visible behind the WRX’s wheel. They work together with the calipers and brake pads to slow down your Subaru WRX. Due to braking friction, rotors have to withstand and dissipate a tremendous amount of heat. This causes the rotor surface to be uneven making the brake pedal feel … Read more
P0031 is a generic code, which means that it has the same meaning for the Subaru WRX as it would any other OBDII equipped vehicle. As far as diagnostic trouble codes go, this is a relatively easy one to diagnose. It is usually caused by a bad oxygen sensor, or a wiring issue. Table of … Read more
While your Subaru WRX’s engine mounts can last the life of the entire vehicle, it is possible that they will go bad. Vibration and a clunking sound are the two most noticeable symptoms when driving the vehicle. There are plenty of visible signs as well. Engine mounts connect the engine to the frame of the … Read more
Your Subaru WRX’s ECM (Engine Control Module) is its brain. Just like a human’s brain, your WRX can’t function without it. It is sometimes referred to as the ECU or PCM. It’s all the same thing. The ECM controls and directs your entire drivetrain (unless there is a serrate transmission controller). When an ECM starts … Read more