Skip the auto shop - Our mechanics make house calls

Q: EPC Light

asked by on

When driving it seems to run fine until you get on the high way or even when you try to accelerate quickly it starts to rev up in the high RPM's and doesn't want to shift right into a higher gear ! I'm not sure what I should do! I've been told that it's my MAF or my speed sensor or throttle body ! Not sure what to do ! It also has a little humming to it when you accelerate but it doesn't sound bad more an exhaust issue so I'm not sure if it's related or not but other wise this car runs perfectly fine! Wonderful car

My car has 166207 miles.
My car has an automatic transmission.

Hello, thanks for writing in about your Volkswagen Jetta. This is a common issue when the mass air flow sensor is failing or the throttle position sensor is faulty. This will cause the intermittent hesitation and spikes in RPM’s as you’ve described. I would recommend having an expert, such as one from YourMechanic, come to your home to diagnose your shifting issue firsthand and help you repair it accurately.

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

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: Where is the crankshaft sensor located please

The crankshaft sensor on the 3.5 l motor is located on the left side of the motor near the transmission end of the motor. It is held in by one bolt and goes into side of engine block.

Q: Loud humming sound

Hello. Yes, from what you described, it does sound like this is an issue with the wheel bearings. You can find instructions for replacing the wheel bearings on this page. If the problem persists after you have had this repaired,...

Q: Squealing of the engine while going uphill and at around 2000 RPM

A squealing noise may be the serpentine belt slipping or one of the accessories binding. Your tensioner or pulley may be bad and need to be replaced. Finally, your compressor pulley bearing may be going bad and it could seize...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...