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

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From a post made by CincyTT awhile back:

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99 2.8QM

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.

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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.

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99 2.8QM

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?

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