Service engine light stays on?

Its really a sensor not a valve.

but first of all you say you have a check engine light?

well that tells you the computer has detected something wrong with the vehicle and it will tell you what it detected this guide will help us get he code.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

scan for codes and post them back here and we should have no problem finding out whats wrong.

First thing, have the van scanned for codes, find out which o2 sensor is bad. Have it replaced. Normally that will set a check engine light, so verify that someone did not unplug your bulb that shows your check engine light in the dash. Alot of shady used car dealerships do that. But the OBD 2 diagnostic port never lies. Like I said, have it scanned, replace whatever o2 its stating, clear the codes, go from there.

Bring it to your parts store(autozone) they will scan the computer and give you a code. Check back in with us and we will tell you what to do. Id get the codes before I brang it back to the place you bought it.

Hello,

Could be any number of things. Go by your local auto zone and ask them to pull code for you, they will do it free.

Post the codes here.

Did the light stay on with the engine running? Also, have you checked for trouble codes again?

Let me know.

Joe

Okay, I asked because it should come on until the engine is running. Have you had the chance to check for codes? Is this a natural gas vehicle because the 141 indicates that it is The codes you indicated seem to be related to a short.

Let me know if the same ones come back. Also, check connectors, damaged wiring, or corrosion in the plugs.

Joe

You are very welcome. Let me know what you find and what the codes are. One more thing. If your scanner can provide live data, let me know what the short term fuel trims are.

Take care,
Joe

Check for vacuum leaks and check the idle air control valve. IT is on the throttle body. When removed, there is a pintil that moves. Turn the key off and on to make sure it is working.

First eliminate all vacuum or air leaks in the system as suggested. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.