Q: Replaced egr valve and drive cycle for egr and evap won't complete

asked by on January 19, 2018

So I replaced my egr valve as suggested by a mechanic on here and I reset the code and It has been 150 miles and no code and running better! But my problem now is that my egr and evap im monitor says incomplete (i need 1 of them to clear, the other 6 are ok) and I have tried the drive cycle driving suggestions and still incomplete. My scanner is a cheap one from walmart, could that be the issue or am I missing something yet again or should i drive it more? A local shop said just drive it 100 miles and it should be good but I'm past that now... any help will be very appreciated! This car is frustrating me lol

My car has 177800 miles.
My car has an automatic transmission.

Hi Jeremy. Thanks for the question today. The type of digital scanner used can significantly impact the ability to clear codes. So, if you’re using a generic code reader that does not have Chevrolet-specific software to access all OBD-II generic and GM-specific codes, then that’s likely the problem. It’s also possible that the code reader you’re using is telling you incorrect data. Typically driving the vehicle for 100 to 200 miles will clear the system, so you might want to have a professional mechanic take a stab at it with their equipment if it doesn’t clear up in the next week or so.

Was this answer helpful?
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

My Mercury Mountaineer 2003 will not start.

Hello, thank you for writing in. What sensor was unplugged when you started the vehicle? You will want to consider this sensor and the different systems that it may provide information to. Without that information the computer may have shut...

Oil Change timing

Your vehicle has an on board, computerized oil life indicator system. When the system determines that an oil change is actually needed, the oil life indicator will provide a maintenance message (see your Owner's Manual for further and complete details)....

White smoke

Hi there: Swapping out a used engine for a slightly damaged one is not as easy as it once was. In fact, along with changing engines, you'll most likely have to reset or reprogram your ECU (add a few hundred...

Related articles

The Best Used Cars to Buy If You’re an Athletic Coach
If If you are an athletic coach, you need a used vehicle with tons of room to transport gear. Once in awhile, you may have to take a player or two along with you as well. What this means is...
Top Automotive News & Stories: October 1-7
BMW i5 images leak, an ultra-lux Jeep, hydrogen-fueled Colorado ZH2, Fisker's electric future, record plug-in sales, NHTSA Road to Zero, and more.
The Best Used Cars to Buy If You're a Farmer
If If you're a farmer, you know that what you need isn’t a used car – it’s a used pickup truck. How else are you going to haul around hay, implements, garden produce, fertilizer, and all the other things you...