my cel came on so i took my car to auto zone and had the codes pulled. can anyone tell me what p1128 is

 

From a post made by CincyTT awhile back:

 

Could this have anything to do with my DV that I recently installed or no? I'm supposed to be taking my car to Canada tomorrow and I want to try and get this figured out before I leave.

 

I suppose if the DV is hooked up incorrectly or there is a damaged or loose line (always possible when you're disconnecting and reconnecting them) then there's a chance that could've caused it. Take a look around the areas you were working in, and make sure all the lines are in good shape, not split, and are connected securely.

 

I've been outside messing around with my car trying to figure out what the problem is and I can hear a faint hissing sound from the driver's side of the engine bay. Any idea if this is related to the P1128 code I threw or am I just going crazy because I can't figure this out?