P0171 and P0174 both indicate that there is a lean condition present in your Cadillac STS. 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 Cadillac STS’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 Cadillac STS has a sputter, it is most likely going to be caused by bad fuel system, ignition system, MAF sensor, or bad catalytic converter. Your STS’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 Cadillac STS 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 Cadillac STS 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 Cadillac STS 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
Many modern GM made vehicles have a battery saver feature, this includes the Cadillac STS. If you are getting a “battery saver active” message, it means that your STS’s electrical system voltage has dropped to a critical level (less than 11.7 volts). Typical electrical systems run at 13+ volts with the engine running. The battery … Read more
Rotors are metal discs that are visible behind the STS’s wheel. They work together with the calipers and brake pads to slow down your Cadillac STS. 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 Cadillac STS 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 Cadillac STS’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