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 $94.99 - $114.99 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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Ignition stuck.
I would try the spare key a few times to see if its a problem with the individual key or the tumblers in the lock cylinder itself, if it works with the spare have a few copies but if you...
High idling, engine misfiring, car jumps at high RPMs
Hey there thanks for writing in about your 2002 Hyundai Elantra GT. The high idle is likely a bad idle air control motor (or air leak in the intake system). The misfire also may be caused by the factory spark...
My brakes started grinding for no reason
You may have a problem with the wheel bearing (https://www.yourmechanic.com/services/wheel-bearings-replacement) that is noisy when you have weight of the vehicle on it. If the noise is a constant grinding noise, then it is most likely the bearing. If the noise...
Hello have you ever heard of a starter lever going bad, not the actual starter in a 2011 hyundai sonata
This was a known recall on many Hyundai Sonatas in this year. There is a technical service bulletin (https://www.yourmechanic.com/advice/tag/technical-service-bulletin) issued: TSB 13-EE-001. Your car should have the 100k warranty. I would recommend taking this to the dealer to have them...
Battery Light and Low Fuel Light on with no power
This is a common issue among this generation of the Chevy Trailblazer and is generally the result of one of two things. A weak battery can easily cause this to happen. There is also a known problem with the instrument...
Lost car remote
Hi and thanks for contacting YourMechanic. Yes you can get another remote (https://www.yourmechanic.com/article/how-to-purchase-a-remote-keyless-entry-system-for-cars-by-brady-klopfer) and program it to match your vehicle, but make sure that the remote is programmed to the VIN (https://www.yourmechanic.com/article/how-to-decode-a-vin-vehicle-identification-number-by-jason-unrau) of the vehicle if you tend to get...
I have a 2014 dodge journey the lighting bolt symbol came on in the dash while driving an now it doesn't wanna go like it's hung i
You may have a transmission sensor or mechanical issue in the transmission and will need to have the computer scanned for codes that will point to the problem.
Steering wheel vibration and shaking
You probably should have changed the struts in pair at least because now you have an original strut on one side and a replacement strut on the other. The two might be slightly different in construction even if they seem...

Related articles

2012 Toyota Sienna vs. 2012 Dodge Grand Caravan: Which One Should I Buy?
The battle of the minivans: Toyota Sienna versus the Dodge Grand Caravan. Both of these comfy people-movers provide options galore, and the minivan is meant to get everyone where they need to go safely and quickly, at a reasonable cost...
The Best Used Cars to Buy If You Have a Tiny Parking Space
In In many cities parking spaces come at a premium, so you only want to purchase one small space. This small space will end up dictating what vehicle you purchase, so we’ve rounded up some great candidates. Must-haves Arm yourself...
Top Automotive News & Stories – September 3-9
This week's top auto news: Ford's 3D printed future, Dieselgate guilty plea, Toyota Supra prototype spied, LaFerrari Aperta on the road, and more.