Q: Check Engine light illuminated

asked by on February 11, 2016

The Check Engine light is on. Mechanic said there was a leak, but they couldn't find it.

Check Engine Light is on Inspection $79.99 - $99.99 Get a Quote

Hi. A Check Engine Light that relates to a leak will usually be an EVAP leak. EVAP leaks can be very hard to find without the proper training or equipment. I suggest having a well technician use a smoke machine to help pinpoint the leak. The machine will pump smoke through your entire EVAP system and anywhere the smoke escapes is where the EVAP leak is located. If you need further assistance, I recommend you have a certified technician, like one from YourMechanic, inspect the Check Engine Light and determine exactly what the problem.

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

I just bought a 2014 Hyundai elantra and the oil pressure light flickers on and off only sometimes .Its Like in a blink of an eye

Excepting an extremely low oil level, oil pressure is not a function of whether the oil level is high or low. If the light is coming on, engine oil pressure may simply be below the minimum pressure requirement at idle....

Dead battery

You need to check to see if the corrosion is causing a no connection from the battery to the main power supply. The corroded cable may need to be replaced.

Iod Fuse / Check Engine Light

Your first order of business is to extract the problem codes which are driving the Check Engine light. Hesitation to start when cranking - if this is what you mean - could be a sign of a weak power supply...

Exhaust leaking into cabin

Hi. First thing to note is you should not be getting exhaust gases into the cab through the a/c vents unless you have an engine that is leaking exhaust. My recommendation is to have your engine checked for exhaust leaks,...

Pinpointing an oil leak - part coming off of the engine toward the back on the passenger side

Hello. From your description, it sounds like you are referring to the turbo intercooler. It is common over time for oil to build up in here due to wear in the turbo charger. I usually check the oil in the...

2008 Ford Focus, won't go in reverse.

Hi, thanks for writing in. I'd be happy to help. You may have a reverse clutch band is not getting actuated or is slipping. I suggest you have the transmission pressures checked by a transmission mechanic to see if the...

Check Engine light back on

The two code are for two different issues and if both codes were not fixed, or after the repairs the engine self learn was not reset, then the light may come back on and the car not run correctly. I...

Can I disarm my seat belt chime in Nissan Micra k12

Try to connect all the passenger seat belts even if no one is in it. Make sure you wear seat belts if in seat. Sometimes the seat sensor detects someone in the front seat passenger side even when no one...

2000 Mercury Sable power steering leak

Hello, and thank you for writing in. The vehicle's in-line filter is housed in a unit that is either clamped on or has a quick disconnect. If you are able to locate the leak, you can determine if the filter...

Related articles

P0080 OBD-II Trouble Code: Exhaust Valve Control Solenoid Circuit High (Bank 1)
P0080 P0080 trouble code definition P0080 is in reference to the bank 1 exhaust valve control solenoid. The vehicle may have a bank 1 and bank 2 control solenoid. This code may be seen in association with P0078 and P0079....
P0973 OBD-II Trouble Code: Shift Solenoid A Control Circuit Low
P0973 means there is an error with the shift solenoid A control circuit due to a faulty solenoid, control circuit,or low or dirty transmission fluid.
P0353 OBD-II Trouble Code: Ignition Coil C Primary/Secondary Circuit Malfunction
P0353 means a malfunction has been found specifically in ignition coil C. Problems may include broken connector locks and loose connection at coil.