Q: Q: Engine light...

asked by on

So my engine light came on 2-3 weeks ago and I took it to a mechanic I had never used before and they checked it and also did a full car inspection, so they did a lot of good amount of work (Oil chance, Air filter change, etc.) Then 5 days after I got it back the engine light came back on and it was leaking gas out of intake valve/gasket and they fixed that, now 5 more days after getting it back again the engine light came back on and I was wondering what might cause that and/or I should still trust that mechanic.

My car has 70000 miles.
My car has an automatic transmission.

when your check engine light comes on, it is because your car’s controller has detected a malfunction and stored a corresponding trouble code. The technician can read the codes with a scan tool, and take the appropriate action. He then clears the code from the system and the light goes out. Even if the malfunction has not been fixed, the car has to go through two complete "drive cycles" before the light will come back on. A drive cycle begins with a cold start and requires that the car be driven long enough for it to warm up fully before it is complete. That is why, in many cases a technician can fail to repair the problem and the CEL will not return for a couple of days. Sometimes a novice technician might not know how to road test a car and check for "pending" codes to make certain the problem is solved. I can’t give you any advice about the repair without knowing what code(s) the technician found. But I can suggest that you start fresh and contact YourMechanic, who will send a technician to your home or office to read the codes and help you understand what needs to be done.

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: Engine light...

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: Car headlight intermittently on/off even after new bulb

An intermittent headlight issue is a common problem. The most likely cause are the headlight assembly itself, a wiring issue, or a faulty switch. Any of these have the potential to cause the headlight to intermittently fail. If the headlight...

Q: My service engine soon light is on. I hear like a rattling noise when engine is running sometimes. The power doesn't feel the same

If you are referring to the check engine light on your vehicle occasionally the cause of it illuminating is the gas cap is loose. If the rubber seal on the gas cap is intact and the cap is tight, all...

Q: When it rains water leaks inside my car to the passenger side.

If your vehicle is equipped with a sunroof, the sunroof drains may be clogged or the drain hose connection to the body may have come loose. If the drain hose is pulled from the body, water will leak into the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...