Q: Check engine light

asked by on February 23, 2017

It is a Toyota Isis 2000cc,d4dengine,it has started showing check engine sometimes,but lately it is showing throughout,I went to a mechanic today and we put new transmission oil,but still I can see its behaving the same,please advice.thanks. My car has an automatic transmission.

My car has 200000 miles.
My car has an automatic transmission.

Check Engine Light is on Inspection $79.99 - $89.99 Get a Quote

Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Due to the wide range of possibilities for the check engine light to come on, the best and most efficient way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. This will allow a mechanic to determine more specifically what to look for in diagnosing your vehicle. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

My car is making a knocking noise - 2003 Toyota Corolla

Hi there. From the description you have provided, the knocking noise in your engine is serious. The engine oil light coming on while driving down the highway, then quit running is equally concerning. Assuming you have had the engine's oil...

Horn sounds by itself

This is generally caused by a short in the steering wheel cable reel assembly, but could also be a bad horn switch, or horn relay. If the cable reel is faulty, the steering wheel will have to be removed, and...

When should I replace my timing belt? How much will it cost on my vehicle?

Hello. The timing belt is suggested to be replaced on your vehicle at the 9 year or 90,000 mile mark, whichever comes first. Timing belts are great idea to replace at suggested intervals because simply put, they are the heart...

Car radio dead

Hello, this could be a simple problem to fix. If the fuse is blown it will cause the radio to have no power. You could also just have a bad radio, and if this is the case, the radio unit...

Why is my power steering fluid bubbling up a bright orange fluid? Is that rust?

Hi there. Unfortunately, basic ATF is not the recommended power steering fluid for your 1998 Toyota Camry. The power steering fluid that is recommended for your vehicle is either Dexron II or Dexron III. It's likely that the wrong fluid...

"Transmission Service Urgent" light is on.

Hi there. Check the transmission fluid level and make sure that its full. When checking the level, look at the color of the fluid. If the fluid is red or dark red, then I recommend draining the transmission oil and...

Were is my knock sensor on my vehicle?

Hello. The location of the knock sensor would be dependent on which model of engine your 4Runner is equipped with. Knock sensors are usually bolted directly to the engine block, as they are designed to monitor and detect engine knock...

Engine ran for 4 minutes with no oil

Depending on the severity of the heat damage, this may cause bearings to be damaged or destroyed which will ultimately cause many other parts to fail. If this is something that the dealership is responsible for, I would recommend having...

Temperature needles moves to "hot" when idle but goes back to "cold" when moving.

The engine temperature fluctuating as it is can be caused by a number of components or problems. If the cooling system is restricted, coolant flow may be reduced at low engine speeds (idle) and be better when moving. If the...

Related articles

The Best Used Cars to Buy If You're in a Wheelchair
Being Being in a wheelchair means you have a very specific list of demands, and requests for your vehicle. The main focus is of course how you will get in and out of the vehicle. There are some other aspects...
Top Five Selling Cars in Colorado in 2012
Colorado Colorado offers a varied climate depending on where drivers are located. Those in lower elevations see plenty of sunshine all year, while those in the mountain areas can see as much as 300 inches of snow. Due to this,...
The Best Used Cars to Buy If You’re an Interior Designer
As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...