Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light on - 2007 Mazda CX-7

asked by on

The check engine light is on. This remains on for couple of days and again without doing any rectification job the light automatically goes off. The light does not remain again for couple of days. Again it comes on. Usually the light goes off during starting the car. But the light always comes on when the car is running.

My car has 155920 miles.
My car has an automatic transmission.

Hi there. When the Check Engine Light comes on, it will store a trouble/fault code in the engine control unit. It will remain on as long as the ECU continues to see the fault that turns it on. If it goes off by itself, then comes back on a few days later then you have an intermittent fault. The best way to find the cause while the Check Engine Light is on is to have a certified technician perform a diagnosis of any existing trouble codes that are being read with the light. That way, the fault present in the system can direct the mechanic towards the problem and the technician can find the root cause.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Get a quote

What others are asking

Q: At light on and car stalling

The AT Light is indicating a fault with your transmission. The transmission in your particular vehicle has its own computer that can self diagnose issues it may be having. A qualified technician, like one from YourMechanic, could retrieve any stored...

Q: Popping noise when accelerating

Hi. The noise will have to be inspected to initiate a diagnosis of what the problem might be. If the noise only occurs when the body of the vehicle shifts its weight, then it is either the suspension, body mount,...

Q: Is there a known fix for the mazdaspeed3 pcv problem?

For vehicles produced prior to 2008, Mazda published a Technical Service Bulletin (TSB) referring to a redesign to resolve the excess pressure issue. As far as the 2012 model though, I do not see a comparable published TSB dealing with...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...