Check Engine Light: What You Need to Know

What does it mean when my check engine light comes on?

The check engine light warns drivers that something is wrong and occurs when the computer issues an error message.

A glowing check engine light means that the onboard diagnostic system has detected a problem affecting the emission controls. There are dozens of possibilities as to why it has illuminated. It could be something as simple as a loose gas cap, bad airflow, a bad oxygen sensor or a faulty catalytic converter. When this warning light comes on, it generates a trouble code that can be read by connecting a diagnostic scanner to the vehicle's onboard diagnostic system; that will steer your mechanic to specific areas and help find the cause. A flashing check engine light means the problem is serious enough that it warrants immediate attention to prevent expensive repairs. Stop as soon as it is safe to do so.


How soon do I have to get my check engine light checked once it illuminates?
Though a check engine light doesn't always signal that something needs immediate attention, it shouldn't be ignored. While it might be minor, it could be something bad, something that will grow worse quickly if left unchecked. For example, a faulty oxygen sensor can reduce fuel economy, raise emissions and cause the catalytic converter to overheat. Replacing a catalytic converter will be much more expensive than an oxygen sensor. If the check engine light is flashing that means the situation is dire and needs to be addressed pronto.


                                                                                                                                                                                                                                                                          Why is it important to diagnose an                                                                                                          illuminated check engine light?

The only way to find out what caused the check engine light to illuminate is to have a mechanic connect a diagnostic scanner to the onboard diagnostics system to extract trouble codes that will help locate the source. The sooner that's done the better.

Transmission Fluids

Transmission Fluid: When you should change your cars` gear oil ?

The manufacturer's maintenance schedule for many automatic transmissions doesn't call for fresh fluid until 60000-100000 kms or, with some German car   transmissions, even 150,000 kms. A lot of mechanics say that is too long and it should be done at least every 50,000 kms. Manual transmissions may be on a different schedule, so it's best to consult the maintenance schedule in the owner's manual.

Like other vital automotive fluids, transmission fluid deteriorates over time. Hard use — such as frequent stop-and-go city driving, hauling heavy loads, trailer towing — will accelerate the deterioration. That kind of driving raises the operating temperature of the transmission, and heat puts more strain on the transmission and the fluid, which helps facilitate gear shifts, cools the transmission and lubricates moving parts.

If you do a lot of driving under high-stress conditions, you should check the transmission level more often and have a repair shop check the condition of the fluid. Transmission fluid often is red but can come in other colors, and as it deteriorates it tends to turn darker. It may also acquire a burned odor that could indicate it needs to be changed or that the transmission is developing mechanical problems. Another indication it needs changing is dirt or other debris in the fluid. When you take your vehicle in for an oil change or other routine service, the repair facility may urge you to pay for a transmission-fluid change or flush. Even if they can show you that the fluid is darker than original, that might not mean you need fresh fluid right now. Step back, check the maintenance schedule in your owner's manual and see what the manufacturer recommends before you decide. This also will give you time to price shop.

Many repair shops use flush systems that force out the old fluid and pump in new fluid. Though that sounds good, some manufacturers say you shouldn't do that (Honda is one; there are others), so you need to know this before you agree to a flush. Look in your owner's manual. Some manufacturers, such as Honda, also call for their own type of transmission fluid and warn that using other types could cause damage. Moreover, some automatic transmissions have filters that should be cleaned or replaced when the fluid is changed. Make sure the repair facility is using the correct fluid and procedures for your vehicle.

If you have never changed the transmission fluid in your vehicle and have more than 100000 kms on the odometer, should you change it now? We have seen mixed opinions on this, with some mechanics suggesting you should just leave well alone if you aren't having shifting problems. Adding fuel to this theory are stories about older transmissions failing shortly after they finally received fresh fluid. We have a hard time accepting that fresh fluid causes transmission failure, so our inclination would be to have it done if you're planning on keeping the vehicle a few years or longer. However, fresh fluid is not a cure for gears slipping, rough shifting or other mechanical problems, so don't expect a fluid change to be a magic elixir.

Brake Pads: What You Need to Know

Subject to tremendous friction and heat, brake pads wear down and must be replaced as part of a car's regular maintenance. In disc-brake systems, the brake pads are the friction material the caliper squeezes against the rotating disc, or rotor, to slow the wheel's rotation and stop the car. In drum brakes, the pads are called shoes.
How do I know when to change my brake pads and rotors?
Squeaks, squeals and metal-to-metal grinding noises are typical signs you're past due for new brake pads and/or rotors. Other signs include longer stopping distances and more pedal travel before you feel significant braking force. If it's been more than two years since your brake parts were replaced, it's a good idea to have the brakes checked at every oil change or every six months. Brakes wear gradually, so it can be hard to tell by feel or sound when it's time for new pads or rotors.

How often should I replace my brake pads and rotors?
Brake life depends mainly on the amount and kind of driving you do, such as city versus highway, and your driving style. Some drivers just use the brakes more than others. For that reason, it's hard to recommend time or mileage guidelines. On any car more than 2 years old, it's a good idea to have a mechanic inspect the brakes at every oil change, or twice a year. Repair shops can measure pad thickness, check the condition of the rotors, calipers and other hardware, and estimate how much brake life remains.

Why do I need to change my brake pads and rotors?
Brake pads and rotors are "wear" items that require periodic replacement. If they aren't replaced, they'll eventually wear down to the metal backing plates to which they're mounted. Rotors can warp, wear unevenly or be damaged beyond repair if the pads are worn down to the backing plate. How long pads and rotors last depends on how many miles you drive and how often you use the brakes. The only guarantee is that they won't last forever.