Skip the auto shop - Our mechanics make house calls

Q: I suspect my egr system is clogged up possibly causing the knock senor code

asked by on

I was wondering where exactly is the egr valve on the 2010 Chevy cobalt? because I want to clean that out first, I believe its clogged up. When testing the sensor system do I remove the knock sensor from the block to test the system to see if it indeed has a knock? any advice would help me out tremendously

My car has 142000 miles.
My car has an automatic transmission.

Hey there, the EGR valve usually is located on the exhaust manifold. The EGR valve can become clogged over time leading to many different issues. In some cases, cleaning the EGR can fix the fault, but not always. When a knock sensor is tested by a technician, they do not generally remove them. If you want to have this inspected, a qualified technician, such as one from YourMechanic, will be able to diagnose this fault and perform any repairs required.

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!
  • Home
  • Questions
  • I suspect my egr system is clogged up possibly causing the knock senor code

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: What does the engine oil pressure Warning Light mean?

The engine oil pressure Warning Light is located on your instrument panel. This light illuminates when there is an issue with oil flow through your engine. Often this problem is caused by low oil levels. Tip Like all warning lights,...

Q: Having possible transmission problems on my car

You may have a problem with the torque converter not going into lock up properly. There are a couple of technical bulletins which say to replace the torque converter. There is also another bulletin that says to see if the...

Q: Is it possible to install my broken serpentine belt back my car?

Hi, thanks for writing in. I'm a little confused by your question. If you're asking whether it's possible to install a broken serpentine belt on a vehicle and drive 20 miles, I'd say not. If the belt is physically broken,...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...