Skip the auto shop - Our mechanics make house calls

Q: Check engine light comes on when accelerating hard in first gear

asked by on

I recently brought the my first car a month ago. A couple of weeks ago, the check engine light came on, then went off again. When it came on a second time I took it back to the dealership who assured me the car is fine and it was just a fuel starvation issue. They seem to have turned the CEL off. 2 days later, as I accelerated hard in first gear, the light came back on. This is the second time in under a week this has happened and I am wondering if I should trust the dealership telling me it's nothing to worry about. I don't have a lot of money so should I just leave it? What could this be? Thank you for your help!

My car has 57000 miles.
My car has a manual transmission.

Hi Laura, welcome to YourMechanic and thanks for writing in. I’d be happy to help.

This could be potentially a faulty mass airflow sensor which is something that regulates air intake into the engine, and relays this info to the car’s computer which then adjusts fuel supply to match. If this is not working properly, this can cause a fuel starvation issue, however when this happens you will normally notice a slight hesitation in the accelerating power of the car.

If you would like further help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect the Check Engine Light for you, and make or suggest any repairs as needed. Our technician will have a scanner than can scan your car’s computer for any trouble codes that may be present.

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: Speedometer and odometer not working

Hi, have you had a chance to get the engine code checked out? Other Integra owners have reported similar issues and usually the VSS or Vehicle Speed Sensor as the culprit. Both the speedometer and the odometer use this sensor...

Q: Car is loosing coolant

Your car is obviously loosing coolant. It could be a leak in a hose or water pump or something like that, or it could be going into the engine through a head gasket. either way you need to get it...

Q: Car won't shift into 1st gear.

Hi and thanks for contacting YourMechanic. From what you've described, you'll need to check the adjustment of the cable. The cable may be too short, not letting the transmission engage 1st gear. If you need a diagnosis with your shifting...

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...
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...