Q: Q: My Check Engine Light is on and will not turn off

asked by on

Check engine light is on. I installed a cold air intake a few years ago. Some time later my check engine light would go on and then turn off after a while. Now it is always on. I noticed some engine oil contamination aparently being vacuumed through the PCV line connecting to the cold air intake and going into the throttle body. Is it possible this might have set the check engine light on? Would an Oil Catch Can help in solving this issue?

My car has 125000 miles.
My car has an automatic transmission.

It is possible that the recirculation of the oil back into the intake could be causing an issue, if the amount is excessive. However, without reading any troubleshooting codes, there would be no way to confirm why the Check Engine Light is illuminated; the Check Engine Light can come on for any number of reasons. The first thing that you are going to need to do is use a scanner to pull the codes from your vehicle’s computer and see what they indicate. If you need assistance with this, you can always contact a certified technician, such as one from YourMechanic, to diagnose the reason for your illuminated Check Engine Light.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: My Check Engine Light is on and will not turn off

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: Q: Can't pass smog check due to Check Engine light.

In your case I would recommend getting a second opinion. Enlist the help of a professional, such as one from YourMechanic, to scan your vehicle for trouble codes. The check engine light and the smog test failure are certainly related....

Q: Hi Robert, I'm debating whether or not I should purchase a 2010 GTI.

Hi there. I purchased a similar VW for one of my kids as a first car last year - and it was one of our better financial decisions. The GTI - specifically VW's 2.0L turbo is peppy, yet incredibly fuel...

Q: There is smoke coming from my car.

If you are having to top off the oil once a month, depending on how many miles you drive per month, this may suggest that your engine is burning the oil. If the smoke is a blue colored smoke, this...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...