Skip the auto shop - Our mechanics make house calls

Q: My check gage light turns on and now my check engine is turning on as well. What can be the issue?

asked by on

My check gage light turns on. Now my service engine light is one. I had a mechanic turn run the scanner on the truck and nothing seemed wrong. I left the truck where i was stranded and went back after a couple of hours....turned it on and it turned on like if nothing was ever wrong with it. Im wondering what can be the issue with it?

My car has 116000 miles.
My car has an automatic transmission.

A: Hello. Are the warning lights turning off a...

Hello. Are the warning lights turning off and on? This may be a sign that the issue is intermittently showing itself and the scan may have done when the code wasn’t triggered. The computer is constantly running tests and can reset the light on its own. Not every scan tool is created equal with the same technology. You may want to try and have the vehicle rescanned by a different technician with a different scan tool. Without knowing what symptoms the car is having its almost impossible to say what system is being effected. If the check gauge light is also on it’s likely fuel, coolant, oil, or battery issues. Start by having the vehicle rescanned and look further into diagnosing whatever symptoms you are experiencing.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Check engine light does not come on

Hello, thank you for writing in. The vehicle turns the check engine light on when the vehicle starts to show that it is running its tests. The tech is looking for this so that they know the system has not...

Q: i need to know the key sequence to get the check engine codes

Hello. The old style of retrieving codes was indeed done by turning the key on and off again. However vehiles manufactured after 1996 are equipped with OBD-II diagnostic systems. This means the driver or technician can acess and even control...

Q: 2002 Chevy Malibu won't start

The anti-theft indicator is supposed to come on for three seconds when the ignition key is cycled, then go out. Since you said the indicator went out, it doesn't sounds like the anti-theft system is the problem. If you have...

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...
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...