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.

A: Hi Laura, welcome to YourMechanic and thank...

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: Flashing check engine light - 2005 Ford Ranger

Hey there. You should probably have another look at your plugs and wires to see if the work was done correctly. Something may not be well connected causing an intermittent misfire. The Check Engine Light comes on steady when the...

Q: Odometer not working

The speedometer on your car is driven by a cable coming off the transmission. If the speedometer works, but the odometer does not, the problem is in the gauge itself. It can be replaced, or some specialty shops may repair...

Q: Ford Explorer overheating

Hi. The vehicles with the 4.0L engine and this specific year have many different issues that could cause the engine to overheat. Some things to look out for are the radiator side tanks and thermostat housing that leak. Also, the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.