Your Pontiac Sunfire’s torque converter is responsible for connecting and disconnecting the engine from the transmission, transferring power smoothly. When this process fails, it can lead to torque converter shudder. Causes of shuddering can include worn torque converter clutches or the gradual application of the torque converter clutch, which may result in shuddering at varying … Read more
Has the radio in your Pontiac Sunfire stopped working? If so, there are three common causes for this issue. They are a blown fuse, loose or corroded wiring, and a problem with the radio itself. If your radio comes on but isn’t working, this article will cover that too: Please jump to the section that’s … Read more
If you hear your Pontiac Sunfire rattling when going over bumps, this sound could be caused by various issues, from minor to more serious. Here, we’ll explore the potential causes of the rattling sound in your car and offer possible solutions. The most common reason for a rattling noise when hitting bumps is a loose … Read more
There’s nothing worse than finding out your Pontiac Sunfire’s parking brake is stuck, especially when you’re ready for the day. The good news is this problem can be easily fixed with some simple steps. In this article, we’ll discuss the causes of a stuck parking brake in the Pontiac Sunfire and how to get your … Read more
If your Pontiac Sunfire’s heat only works when driving, there are five leading causes you should check. They are low coolant, air pockets, a bad heater core, an airlocked cooling system, and a malfunctioning thermostat. We’ll start with the easy-to-check common problems and work our way to the harder-to-deal-with rarer issues that could be affecting … Read more
The check engine is the most common warning light that appears in the Pontiac Sunfire’s instrument cluster. Well over half of this site’s content is related to solving the various reasons why the check engine light comes on. The good news is that the check engine light indicates that there are Diagnostic Trouble Codes (DTCs) … Read more
If your Pontiac Sunfire has a soft brake pedal, it is a sign of a serious brake system issue. It’s usually caused by air entering the system in some way through a leak. This article covers the six most common causes of a soft brake pedal as well as a solid diagnostic order if you … Read more
Most GM vehicles built in the last 20+ years have a theft deterrent system, that includes the Pontiac Sunfire. Depending on the model year, your car’s theft deterrent system disables the fuel pump, ignitions system, or starter if unauthorized access is detected. When your vehicle Sunfire theft deterrent system message, the system will not let … Read more
Your Pontiac Sunfire’s alarm system is designed to detect potential intruders, keep its contents safe, and keep them from driving your car away. However, it is not uncommon for a car alarm to go off, or keep going off, for no apparent reason– also known as false or “nuisance alarms”. This article will discuss some … Read more
If your Pontiac Sunfire’s key fob is not working, the most common reason is a dead battery. Followed by water damage or fob failure. Below, we’ve listed everything you need to do to get your car’s fob working again. A dead battery is the most common reason a Pontiac Sunfire’s key fob fails. Table of … Read more