Q: I have a 2012 vw Passat. My gas depletes like crazy, even after I've had it serviced? What may be the causes?

asked by on July 20, 2017

Ever since my car warned me I needed it to get serviced, my fuel depletes like crazy. I just got it serviced today, however, it is still depleting. What may be the causes for this?

My car has 9000 miles.
My car has an automatic transmission.

Car is getting worse gas mileage Inspection $79.99 - $99.99 Get a Quote

Hello, thank you for writing in. Several components may be contributing to your decrease in fuel economy. You will want to consider any recent work that you have had done and go through a process of elimination to determine what your main issues may be. Make sure your fuel filter and air filters are clean. You will also want to look into your air intake and coolant temperature sensors. If any are going bad, the calculations run by your vehicles computer will be wrong. For more help with diagnostics and repairs contact our service department to schedule an appointment.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Reving

When the car is in gear, the load on the engine is sufficient to prevent the malfunction. If the engine idle speed on your vehicle is controlled by an idle control valve (ICV), that ICV valve can fail or a...

Low fuel pressure at the fuel rail (30psi) then drops to 10psi occasionally while idling. The fuel sending unit was just replaced. 2004 Dodge Dakota

Hi there - yes, you clearly have a fuel supply issue, mainly focused on getting enough pressure in the fuel rail to the injectors. Check problem codes first, even if the Check Engine light is not illuminated. I suspect your...

How much is steering wheel airbag? 2007 Mercedes S550

Hello - unfortunately, that is not a service YourMechanic can offer at this time. Thanks for thinking of us though!

Why does my car jump/shake when turning left, after i got my right cv axle and lower ball joint replaced?

Hello - from your description, it sounds like the left (driver) side CV joint and axle are bad as well, and should be replaced. The outer CV joints take a beating while turning and applying power. It is possible that...

Windshield wipers are not working

Hi and thanks for your question. It is notorious for the wiper blade arms to strip out on the wiper motor drive rod. Check to see if the motor is turning the drive rod. If the drive rod is moving,...

The car turns off when shifting the gear to neutral automatically.

This is likely related to what is called a neutral safety switch. This is an electrical switch near your transmission that is designed to not allow the car to start when in any gear other than park. Occasionally, this switch...

Hesitation and jerking, delay in shifting

When this type of issue occurs, it is due to a failing component. The component can work most of the time, but when it heats up, then the faults will begin. This is not unusual, and has a few common...

No dash lights or gauges

Hello. The existence of so many non-functioning items would seem to indicate that a main control fuse, and junction box, are not working. Check to see if there are any electrical components that may have been disturbed during the timing...

Related articles

A Buyer’s Guide to the 2012 Honda Odyssey
Minivans Minivans may not be the sportiest, sleekest, or sexiest vehicles on the road, and people in the market for a vehicle to haul all of their kids, pets, and gear around may not be too preoccupied with how that...
A Buyer’s Guide to the 2012 BMW 5-Series
BMW BMW has built a reputation for refined engineering, powerful performance and excellent fit and function. That’s exactly what you’ll find with the 2012 BMW 5-Series sedans. Composed and powerful, they provide a range of price points, features and capabilities...
A Buyer’s Guide to the 2012 BMW X5
The The 2012 BMW X5 is an SUV that offers both utility and ease of driving. The steering is responsive with a good amount of horsepower. If you are looking for a sportier SUV that offers versatility, the BMW X5...