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: Dashboard lights

Hello there. It sounds like there is a problem with intermittent loss of power with your vehicle. A few different faults can cause this particular problem. The most likely would be a intermittent electrical connection, a battery that is failing,...

Q: Electrode tip broke off

One way to try and get it out would be to blow air into the cylinder, to try and dislodge the piece. The other way is to use a specialist tool with a bore scope and grab tool, to try...

Q: I have an issue with my car, any time I turn the wheel it makes a lot of noise 2007 Ford Escape

Hi there - it sounds like the serpentine belt (aka accessory belt) problem. The serpentine belt drives both the alternator and the power steering pump, so when you turn the steering wheel, the belt is loaded pretty hard. The belt...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.