Skip the auto shop - Our mechanics make house calls

Q: Engine light flashing intermittently

asked by on

My check engine light is flashing intermittently. The car shakes when idoling and the revs look really high. There seems to be a loss in power. It only happens when the car gets too hot or when it is going up hill. I'm not sure what this means, can you give me some possible diagnoses?

My car has 75000 miles.
My car has an automatic transmission.

This may be related to a faulty or dirty mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel. This is what causes the hesitation or loss of power you describe. This can also cause the engine to struggle to idle for the same reason. I would suggest having a professional from YourMechanic come to your home to diagnose and replace this sensor.

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: Crankshaft broken

The crankshaft is a very important component in the motor and is balanced very precisely. If the crankshaft were to lose its balance for some reason, major engine damage would occur. This would also cause all of the main and...

Q: My car doesn't accelerate as it should for the first 2 shifts or until 100 km/h.

Hi there. Check the fuel system to the vehicle and see if the injectors need cleaned. Also, check the engine for any vacuum leaks. A vacuum leak will cause the engine to hesitate and not fire all the cylinders properly....

Q: My car is losing power while I'm driving and while idling

Hi there, this may be an indication of a vacuum leak. As you may know, when a vacuum leak is present, this tends to cause a lean fuel condition which will generally make the engine idle higher than normal. I...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.