Skip the auto shop - Our mechanics make house calls

Q: check engine light and car shuddering

asked by on

2009 volkeswagen jetta GLI

Codes: P2279, p0171, p2015, p0300 p0301, p0302, p0303, p0304

check engine light and epc light are on and the car shudders at lower speeds, first couple minutes of driving and now that it's getting colder. Also I've recently replaced the spark plugs and coil packs

My car has 125000 miles.
My car has an automatic transmission.

A: Hi there: After looking into the first err...

Hi there:

After looking into the first error code you posted, the vibration and shaking issues on your VW are most likely caused by a vacuum leak. The P2279 OBD-II code indicates that the ECU has detected a vacuum leak into the engine. This means that unmetered air is entering the engine without the engine sensing it going through the mass air flow sensor and throttle body. There are multiple engine components and sensors that might be causing this issue to occur, which is why you should have a professional mobile mechanic complete an engine is shaking or vibrating inspection first; so they can pinpoint what’s damaged.

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: Check engine light. Code P2004 (Air Intake manifold. Runner control stuck open, bank 1.)

As you know this code is related to the intake manifold and may be caused by several potential issues such as the following: Intake Manifold Runner Binding Or Sticking Faulty Manifold flow valve Manifold flow valve harness is open or...

Q: Blower Motor only working on highest speed.

You mentioned that you started to smell something. This may be a sign that the blower controller or the resistor was burnt out when it was hooked up wrong. You should try replacing the blower controlling resistor that you hooked...

Q: Why does my motor go from running to just dead?

There are no recalls or technical service bulletins (TSB) for the stalling while driving complaint, however there have been other owners who've had similar drivability issues. The fuel pump relay may have an intermittent open circuit, causing you to lose...

Related articles

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...