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

asked by on

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
  1. Home
  2. Questions
  3. Replaced egr valve and drive cycle for egr and evap won't complete

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 turn on the exterior parking lamps?

The exterior lamp control is placed on the instrument panel, to the left of the steering column. To turn on the exterior parking lamps, rotate the control knob clockwise two notches, to the parking lamps icon. When the exterior parking...

Q: When I start my car it sounds like a muffler news up front right below the engine what is that or can you help

It's possible that an exhaust component is leaking and/or is loose. This can be determined by a visual inspection and if you desire such an inspection please request an engine noise diagnostic - suspected exhaust leak/loose mount. If you request...

Q: Burning plastic-like smell when braked for more than 10-20 seconds

If the odor is coming from your car (as opposed to perhaps surrounding cars which can happen) and you are only detecting the odor on application of the brakes, a possibility is the brake caliper is failing to retract and...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...