HI,

I think I posted in the wrong area.. so here it is again:

I first saw this code, and others that were related, last year not long after I bought the car. It was raining hard, lots of water, and I got the "check engine" light which went away after about 20mins. I looked it up in the owner's manual and it said could be caused by a lot of things including water. I had put on a blackwing right before that so I didn't worry about it. I cleared the codes and watched it.

In December (almost a year later) I got the code again. .. this time I only got the one code. Again it was raining hard so I didn't worry about it. I reset it again and went on my merry way..

Well, it's back again - no rain this time. I reset it only to have it come back later in the day.
I checked the service manual, and once I finally found the code, it says the "right bank h0s2 sensor".. and lists several steps to check the possibilities - most require a scanner I don't have one.

Is there an easier way to figure out what is wrong -
what is the most likely culprit -
will it damage the car to drive it until I can fix it?
Is there a "less expensive" place to buy a new H0S2 besides the dealership??

Thanks!
Lanna

 

Call Fichtner Chevrolet 1-406-628-4618 and ask for Bob in Parts, let him know your a forum member and they will take care of you :cheers:

 

Cool... thanks!

 

I am no expert, but my "database" for 2003 models lists P1416 as secondary air injection (AIR) system
and that the air injection check valves can rust shut and cause this error.

 

:iagree: P1416 would be caused by a restricted check valve to the right bank.This valve is located behind the intake manifold :yesnod:

 

The air injection pumps turns on when the engine is first started. Air is injected into the exhaust manifolds to lower emissions. This only occurs when the car is first started. If the O2 sensor does not change readinds during this time the P1416 code will go off indicatiing the right side air injection is not making it ot the exhaust manifold (injecting air causing the 02 sensor to change readings) , If the pump was bad or wasn't getting electricity you would get an error code for the driver's side manifold also, so you know it is downstream from the pump. That leaves the hose itself (doubtful) the check valve (seems to be the prime candidate) and the opening to the exhaust manifold (probably not and let's hope not as I am told you have to take the intake manifold off ot get to it) There have been a lot of posts here on the check valve corroding including the one by C5Tech.
This condition will not harm the car but will cause you to flunk any emissions test where they scan the OBDII information.