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.

A: Hey there, the EGR valve usually is located...

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!

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: how do I get water stains off sunroof and headliner

The best way to get these stains off of your headliner would be to purchase some upholstry shampoo from your local auto parts store. Then, spray some of the cleaner on to a soft cloth. Use the soft cloth in...

Q: Lights

Fluctuations in lighting output can be due to a bad alternator, loose alternator drive belt, wiring faults in the lighting circuit including bad grounds and a weak battery. I recommend you have the battery load tested and, at the same...

Q: Catalyst system efficiency

Hi. There are a few things to check out when receiving this code as it doesn't always mean the catalytic converter is going bad. The car has multiple oxygen sensors that test how efficient the converter is performing. If the...

Related articles

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.