Skip the auto shop - Our mechanics make house calls

Q: EGR valve and vacuum

asked by on

The Check Engine Light is on. According to Advanced Auto, it shows that the EGR valve and EGR vacuum modulator may need replacement or to be cleaned.

If you got code P0401 for the EGR system malfunction, then the system would need to be tested to see whether or not the vacuum modulator valve is holding vacuum and can control the EGR valve. These tests are needed to see if the valve and modulator are good or not; the EGR tube could be in need of cleaning. If all this is done then a proper diagnosis can be given. I recommend having a mechanic, such as one from YourMechanic, run a diagnostic to see if your EGR vacuum modulator requires replacement, or if another path of repair will be necessary.

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: In need of expert advise

Hello, As you know, when transmissions become worn out and start slipping, there is often times little you can do to prevent this from happening as it gets worse. Lucas Transmission Fix is designed for automatic transmissions that slip out...

Q: My car makes a loud humming like whoop sound when I accelerate past 50 MPH and gets louder the faster I coming from front end.

If the noise suddenly appears at 50 mph, then check the brake system as there could be an issue with the brake pads rubbing the rotors. If the noise starts off quiet and gets louder with speed, then check the...

Q: The check engine light and vsa light are on.

The vsa light means that the Vehicle Stability Control or Traction Control has been activated. If the engine light is on and the vsa light is on, then there could be an issue with the traction control system. Check all...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.