Common Car Problems that Trigger the Check Engine Light
Lloyd's Automotive • November 7, 2025
Few things make drivers more anxious than seeing the check engine light glow on the dashboard. While it doesn’t always mean a serious problem, it’s never something to ignore. The check engine light is part of your vehicle’s onboard diagnostic system, designed to alert you when something isn’t functioning correctly under the hood. At Lloyd’s Automotive & Transmission Specialists, we provide expert check engine light diagnostics and repair in the greater Olympia area. Here are four common reasons the check engine light comes on—and why timely inspection is essential.
Failing Oxygen Sensor
Your vehicle’s oxygen sensor monitors the amount of unburned oxygen in the exhaust and helps the engine control unit (ECU) adjust the air-fuel mixture. When this sensor fails, the engine may run too rich or too lean, reducing fuel-efficiency and increasing emissions. Ignoring a bad oxygen sensor can also cause damage to your catalytic converter, which is much more expensive to replace.
Malfunctioning Catalytic Converter
The catalytic converter plays a crucial role in reducing harmful emissions by converting exhaust gases into less toxic substances. If it becomes clogged or damaged, your vehicle will lose performance and fuel-efficiency—and the check engine light will illuminate. A malfunctioning catalytic converter often produces noticeable symptoms like sluggish acceleration or a rotten egg smell.
Bad Spark Plugs or Ignition Coils
Worn-out spark plugs or faulty ignition coils can cause misfires, leading to rough idling, poor acceleration, and reduced fuel-economy. These components are responsible for igniting the air-fuel mixture in your engine’s cylinders. When they fail, improper combustion can trigger the check engine light. Replacing spark plugs and coils at the recommended intervals helps keep your engine running smoothly.
Mass Airflow Sensor Problems
The mass airflow (MAF) sensor measures the amount of air entering the engine, which is critical information for delivering the right amount of fuel. When it malfunctions due to debris or wear, your engine may run poorly, stall, or experience reduced fuel-efficiency.
Check Engine Light Repair in Olympia, WA
When you need auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to make an appointment!
Your vehicle’s automatic transmission is responsible for smoothly transferring power from the engine to the wheels. Because transmission repairs can be expensive and time-consuming, proper maintenance is essential for keeping it in top shape. With a few simple habits, you can help prevent costly breakdowns and extend your transmission’s lifespan. Here are four tips for maintaining your automatic transmission in excellent condition. Keep Up with Regular Fluid Changes Transmission fluid serves as both a lubricant and a coolant, enabling smooth shifting and protecting internal components from wear. Over time, the fluid breaks down and can become contaminated with debris. Old or dirty fluid loses its effectiveness, which can lead to overheating and slippage. Following your vehicle manufacturer’s recommended fluid change intervals is one of the best ways to maintain transmission health. Always use the correct type of fluid specified for your vehicle. Don’t Overload Your Vehicle Carrying excessive weight or towing beyond your vehicle’s rated capacity puts unnecessary strain on the transmission. The added stress can cause overheating and faster wear on gears. Staying within your vehicle’s load limits will help prevent damage and maintain smooth performance. Come to a Full Stop Before Shifting Between Drive and Reverse Shifting between drive and reverse while the car is still moving is a common mistake that can cause serious damage to the transmission. The sudden change in direction forces internal components to engage abruptly, increasing stress and wear. Always bring your vehicle to a complete stop before shifting between these gears. This simple habit can significantly reduce the risk of mechanical issues. Don’t Ignore Signs of Trouble Your transmission often gives early signs when something is wrong. Slipping gears, delayed shifting, unusual noises, or puddles of reddish fluid should never be ignored. Continuing to drive with these symptoms can turn minor issues into major repairs. If you notice anything unusual, have your vehicle inspected by a transmission mechanic as soon as possible to prevent further damage. Transmission Service in Olympia, WA When you need transmission service in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. At our nearby auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call to schedule an appointment!
Your car’s suspension system does more than just make the ride comfortable. It’s designed to keep your vehicle stable, your tires in contact with the road, and your steering responsive. When suspension issues arise, they don’t just affect comfort—they can compromise your safety and lead to more expensive repairs if ignored. Knowing the warning signs of suspension trouble can help you catch problems early. At Lloyd’s Automotive & Transmission Specialists, we provide expert suspension repair in the greater Olympia, WA area. Here are four signs that your car needs suspension repair. Your Ride Feels Extra Rough If every bump, dip, and pothole on the road feels exaggerated, your suspension may not be absorbing impacts the way it should. Worn-out shocks or struts can no longer cushion your vehicle effectively, causing a rough and uncomfortable ride. This is often one of the first noticeable symptoms of suspension trouble. Your Vehicle Dips When Stopping When your suspension is working properly, your car should remain level during braking. If you notice that the front of your car dips sharply when you brake, it’s a sign that the shocks are worn. This problem can reduce stability and increase stopping distances, creating a potential safety hazard. Uneven Tire Wear Develops Your suspension system helps distribute weight evenly across all four tires. When parts of the suspension wear out or fail, uneven pressure is applied to the tires, leading to irregular tread patterns or bald spots. If you notice uneven tire wear despite keeping up with rotations and alignments, suspension trouble could be to blame. Steering Feels Loose or Drifts A healthy suspension system supports precise steering. If your vehicle feels like it’s pulling to one side, drifting on straight roads, or the steering feels loose and less responsive, there may be a problem with the suspension or related components. Ignoring this issue can make driving more difficult—and potentially more dangerous. Suspension Repair in Olympia, WA When you need auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to schedule an appointment for your vehicle’s repair or maintenance needs!
Your car's alternator plays a crucial role in keeping your vehicle running. It generates electrical power and charges the battery while the engine is running. When the alternator begins to fail, your vehicle’s electrical systems can suffer, and eventually, your car may not start at all. Identifying alternator issues early can help prevent getting stranded. At Lloyd’s Automotive & Transmission Specialists, we provide expert alternator replacement and auto electric repair in the greater Olympia area. Here are four common signs that your alternator may be on its way out and should be inspected by a professional. Dead or Weak Battery A failing alternator often leads to a dead or undercharged battery. While batteries naturally wear out over time, if you find yourself needing frequent jump starts, the problem may be with the alternator not charging the battery properly. If your battery is relatively new and you're still experiencing power issues, the alternator is a likely suspect. A mechanic can test both the battery and alternator to determine which one is to blame. Dimming/Flickering Lights If your headlights or dashboard lights dim or flicker while you’re driving, your alternator might not be supplying enough power. This can create a serious safety hazard when trying to navigate nighttime roads. Warning Light on the Dashboard Most vehicles have a dashboard warning light shaped like a battery or labeled ALT or GEN to indicate charging system problems. If this light comes on while the engine is running, it’s a clear sign something is wrong with your charging system, and quite possible the alternator. Ignoring this warning can lead to sudden electrical failure, so it’s important to get your vehicle inspected promptly. Problems with Electrical Accessories As your alternator weakens, you may notice various electrical systems behaving erratically. Power windows may move slower than usual, heated seats might stop working, or your infotainment system could fail. These inconsistencies usually point to an inadequate or unstable power supply, which is a strong sign that the alternator isn’t delivering sufficient voltage to your vehicle’s components. Alternator Replacement & Auto Electric Repair in Olympia, WA For expert auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to schedule an appointment for car care in greater Olympia, WA!
Your car’s brakes are one of its most important safety features. When they start to fail, the risk of an accident increases dramatically. While brakes are designed to be durable, they don’t last forever. Over time, wear and tear can reduce their effectiveness and put you and others in danger. At Lloyd’s Automotive & Transmission Specialists, we provide expert brake repair in the greater Olympia, WA area. Here are four warning signs that your car needs brake repair right away. Squealing or Grinding Sounds If you hear a high-pitched squealing noise when you apply the brakes, it’s usually a sign that your brake pads are worn down and need to be replaced. Pads are commonly designed with a built-in indicator that makes noise when they get too thin. If the squealing progresses to a grinding sound, it likely means the brake pads are completely worn through and the metal parts of the braking system are now grinding against each other. This not only reduces braking performance, but can cause damage to the rotors. Brake Warning Light Comes On Modern vehicles are equipped with dashboard warning lights that alert you to problems in key systems. If your brake warning light or ABS light is illuminated, it’s important not to ignore it. These lights are triggered by issues such as low brake fluid, failing sensors, or other system malfunctions. Driving with the light on can be dangerous and should prompt an immediate visit to the mechanic. Vibrations When Braking A shaking or vibrating sensation when you slow down could indicate warped rotors. This happens when the brake rotors become uneven due to heat and friction. Warped rotors make it harder for the pads to grip properly, leading to longer stopping distances and reduced control. If your car vibrates during braking, it’s time to get your brakes inspected immediately. Soft Brake Pedal If your brake pedal feels soft or spongy when you press it, there could be air or moisture in the brake lines, or a fluid leak in the system. In either case, the brakes won’t respond properly, and stopping your vehicle could become difficult or unpredictable. A spongy brake pedal is a sign that you need immediate professional attention to restore safe braking function. With a brake fluid leak, you should get towed to the shop so you don’t risk an accident. Brake Repair in Olympia, WA When you need auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to schedule an appointment for your vehicle’s repair or maintenance needs!
Your vehicle’s suspension system helps absorb bumps, maintain tire contact with the road, and support proper steering. When the suspension starts to fail, you may notice changes in ride comfort and control. Ignoring suspension issues can lead to further damage and even unsafe driving conditions. At Lloyd’s Automotive & Transmission Specialists, we provide expert suspension repair in the greater Olympia, WA area. Here are four common signs that your vehicle may have a suspension issue. Excessive Bouncing If your vehicle continues to bounce after going over a bump or pothole, it’s a sign that the shocks or struts may be worn out. The suspension system is designed to dampen these movements and keep your vehicle stable. When this component begins to fail, the car may feel like it’s bouncing excessively, especially when driving over rough surfaces. Uneven Tire Wear One of the most common indications of a suspension problem is uneven tire wear. If the suspension isn’t holding the vehicle level or if certain components are worn, the tires may not maintain proper contact with the road. This can result in bald spots or unusual wear patterns, which reduce tire lifespan and compromise traction. Regular tire inspections can reveal early signs of trouble with the suspension system. Pulling to One Side While Driving If your vehicle pulls to one side while driving on a straight road, it could be a sign of suspension trouble. While alignment issues can also cause pulling, worn suspension components like control arms or bushings can lead to inconsistent handling and steering drift. If you find yourself constantly correcting the steering to keep the vehicle straight, a suspension inspection is recommended. Clunking or Knocking Noises Unusual sounds like clunking, knocking, or squeaking when driving over bumps can indicate worn or damaged suspension parts. These noises often come from loose or broken components such as ball joints, control arms, or sway bar links. The longer you drive with these sounds, the more likely it is that additional parts will wear out, increasing repair costs and potentially compromising safety. Suspension Repair in Olympia, WA When you need auto repair in Olympia, WA and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to schedule an appointment for your vehicle’s repair or maintenance needs!
Your transmission is one of the most complex and vital systems in your vehicle. It’s responsible for transferring power from the engine to the wheels and enabling smooth gear changes. Because of its importance and potentially high repair costs, proper maintenance is essential to keep your transmission in good working order for as long as possible. Here’s a look at four maintenance tips for long-term transmission health. Check and Change Transmission Fluid Regularly Transmission fluid plays a critical role in lubricating internal parts, cooling the system, and allowing smooth shifting. Over time, this fluid can break down, become contaminated, or develop low levels due to leaks. It’s important to check the transmission fluid regularly and change it according to the schedule recommended in your vehicle’s owner’s manual. Fresh fluid helps prevent wear and enables the transmission to run at the proper temperature, reducing the risk of costly damage. Address Leaks Immediately Even small transmission fluid leaks can lead to serious issues if not fixed promptly. A low fluid level can cause poor shifting performance, overheating, and accelerated wear. If you notice reddish fluid spots under your vehicle or detect a burning smell while driving, it may indicate a transmission fluid leak. Prompt inspection and repair can prevent further damage. Avoid Aggressive Driving Habits The way you drive has a direct impact on the health of your transmission. Rapid acceleration and hard braking put additional strain on the system. Towing heavy loads or driving in extreme heat without proper cooling can also increase stress. Driving smoothly and giving your transmission time to shift properly can go a long way toward preserving its condition. Get Periodic Transmission Inspections Having a trusted mechanic inspect your transmission during routine service visits is a smart way to catch issues early. Professional diagnostics can identify warning signs like slipping, rough shifting, or delayed engagement before they become bigger problems. Technicians can also ensure that transmission fluid is at the right level and quality. Staying proactive with inspections and tune-ups can help keep your transmission running smoothly for years to come. Transmission Service in Olympia, WA When you need transmission service in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. At our local auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call to schedule an appointment!
Your vehicle’s automatic transmission plays a critical role in keeping your car moving efficiently and safely. When transmission issues arise, they often start small but can quickly escalate into major repairs if ignored. At Lloyd’s Automotive & Transmission Specialists, we provide expert automatic transmission repair in the greater Olympima area. Here are four common automatic transmission problems that should be addressed as soon as possible. Delayed or Slipping Gears If your vehicle hesitates before shifting or feels like it's slipping out of gear while driving, that’s a red flag. This type of issue can indicate worn-out transmission bands, low fluid levels, or internal component damage. Slipping gears can not only affect your car’s performance, but also create a dangerous situation on the road if your vehicle suddenly loses power or fails to accelerate properly. Prompt diagnosis and repair are essential to prevent further damage. Unusual Noises During Shifting Hearing grinding, whining, or clunking noises when your vehicle shifts gears is a sign that something is wrong within the transmission. These noises can point to a variety of problems, including damaged gears or insufficient transmission fluid. The longer these sounds persist, the more likely you are to face a costly repair. Addressing the noise early can often lead to a simpler and less expensive fix. Transmission Fluid Leaks Transmission fluid is essential for keeping the system lubricated and cool. If you notice reddish fluid pooling under your car, it could be due to a transmission fluid leak. Leaks can occur from worn seals, cracked lines, or a damaged transmission pan. Driving with low transmission fluid can lead to overheating and significant internal damage. It's crucial to have the leak inspected and repaired as soon as it's detected. Rough or Hard Shifting If your car jerks or lurches when shifting between gears, it’s a sign of transmission trouble. This kind of harsh shifting can stem from low fluid, faulty solenoids, or internal wear and tear. Left unchecked, the problem may worsen, potentially causing long-term damage to the transmission system. Transmission Repair in Olympia, WA When you need transmission repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. At our nearby auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call to make an appointment!
A properly functioning cooling system is essential for keeping your engine at a safe operating temperature. If the cooling system fails, your engine could overheat, leading to major damage and costly repairs. At Lloyd’s Automotive & Transmission Specialists, our local mechanics provide expert cooling system repair in the greater Olympia area. Here are four warning signs of a cooling system problem. Engine Overheating One of the most obvious signs of cooling system trouble is an overheating engine. If your temperature gauge rises into the red zone or you see steam coming from under the hood, your engine is running too hot. This could be caused by issues such as low coolant levels, a failing thermostat, a faulty radiator, or a malfunctioning water pump. Continuing to drive an overheating vehicle can lead to engine failure, so it’s crucial to pull over safely and alert the mechanic ASAP. Coolant Leaks If you notice bright green, orange, or pink fluid (your coolant might be a different color) pooling under your vehicle, you likely have a coolant leak. Coolant leaks can occur due to worn hoses, a cracked radiator, or a failing water pump. Even a small leak can lead to low coolant levels, reducing the system’s ability to regulate engine temperature. If you spot a leak, it’s important to have your cooling system inspected and repaired as soon as possible. Low Coolant Levels Regularly checking your coolant reservoir can help you detect potential cooling system issues early. If you find that your coolant level is consistently low, there could be a slow leak somewhere in the system. If your coolant levels are dropping without an obvious external leak, it’s best to have a mechanic diagnose the problem. And remember to only check/add coolant after your engine has cooled down. Unusual Engine Smells A strong, sweet smell coming from the engine bay is a common indicator of a coolant leak. This scent comes from ethylene glycol. If coolant is leaking onto hot engine components, you might also notice a burning odor. These smells should not be ignored, as they indicate that your cooling system isn’t functioning properly. Prompt repairs can help prevent further damage and keep your vehicle running smoothly. Cooling System Repair in Olympia, WA When you need auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to schedule an appointment for car care in Olympia!
Your car’s shocks play a crucial role in maintaining a smooth and controlled ride. They absorb bumps, improve handling, and help ensure that your tires stay in contact with the road. As the miles add up, shocks wear out due to constant use, leading to reduced performance and potential safety hazards. Recognizing the signs of failing shocks can help you replace them before they compromise your driving experience. Here are four signs that it’s time to replace your car’s shocks. Excessive Bouncing After Hitting a Bump A well-functioning suspension system quickly stabilizes your vehicle after encountering bumps. If your car continues to bounce several times after hitting a pothole or speed bump, it’s a sign that the shocks are no longer effectively dampening the movement. Excessive bouncing can make your ride uncomfortable and reduce your ability to control the vehicle. Increased Braking Distance Worn-out shocks can negatively impact your car’s braking performance. When shocks lose their ability to control weight transfer, your vehicle may take longer to come to a complete stop. It may also feel like your car nose-dives while braking. If you notice that your car takes more time to slow down, even with properly functioning brakes, failing shocks could be the culprit. Uneven Tire Wear Your shocks play a vital role in keeping your tires evenly pressed against the road. When they start to fail, your tires may have inconsistent contact with the pavement, leading to uneven wear patterns. If you notice bald spots or excessive wear on certain areas of your tires, your shocks may no longer be providing the necessary stability. Uneven tire wear reduces traction and overall safety. Fluid Leaks on the Shocks Shocks contain hydraulic fluid that helps dampen vibrations and control movement. If you notice oily residue or leaks on the shocks, it means the internal seals have likely failed, causing fluid to escape. Without enough hydraulic fluid, shocks lose their ability to function properly. Visible leaks indicate that the shocks are no longer capable of providing the necessary support and should be replaced as soon as possible. Suspension Repair in Olympia, WA When you need auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to make an appointment for your vehicle’s repair or maintenance needs!
Your vehicle’s transmission fluid is essential for smooth operation, providing lubrication, cooling, and hydraulic power to your transmission system. A transmission fluid leak can lead to significant damage if not addressed promptly. At Lloyd’s Automotive & Transmission Specialists, we provide expert transmission fluid leak repair in the greater Olympia, WA area. Here are five common signs that your vehicle might have a transmission fluid leak. Puddles Under Your Car One of the most noticeable signs of a transmission fluid leak is a puddle of liquid under your parked car. Transmission fluid is typically reddish to pinkish in color, though it may turn darker if contaminated. If you spot a puddle with this color and a slightly sweet smell, there’s a good chance it’s transmission fluid. Addressing the leak early can prevent further damage to your transmission. Low Transmission Fluid Levels If your transmission fluid is consistently low despite regular refills, it’s a clear indication of a leak. Check your vehicle’s transmission dipstick regularly to monitor fluid levels. Driving with insufficient transmission fluid can cause the system to overheat and lead to severe internal damage, so it’s crucial to resolve the leak as soon as possible. Slipping Gears or Poor Shifting Transmission fluid is vital for smooth gear changes. If you notice your car struggling to shift gears or slipping out of gear unexpectedly, it could be due to low transmission fluid caused by a leak. This symptom often worsens and should be promptly addressed. Unusual Noises A leaking transmission can result in unusual noises such as grinding, whining, or clunking. These noises occur because the lack of adequate lubrication increases friction within the transmission components. If you hear strange sounds coming from your vehicle, it’s essential to have the mechanic inspect the transmission for leaks and other issues. Overheating Transmission Transmission fluid plays a critical role in regulating the system’s temperature. A leak reduces the amount of fluid available to cool the transmission, causing it to overheat. An overheating transmission can cause a burning smell. Ignoring this issue can lead to costly repairs or complete transmission failure. Transmission Repair in Olympia, WA When you need transmission repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. At our local auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call to make an appointment!
