Question About Computer Codes P0328 and P0430
Howdy everyone. I've got a 2002 XE EFI 4WD 5-speed with a "Service Engine Soon" light on and the above two codes are being thrown. Maybe someone here can give me some advice?
Firstly, I realize that P0328 is the infamous knock sensor issue. The other code, according to my Nissan dealer, indicates a failed Bank 2 Catalytic Converter. The truck has also been diagnosed with cracked exhaust manifolds which ties in with the CC issue. My CC does have an internal metallic rattle when the engine is started cold so I'm inclined to think that the dealer is correct.
Here's my situation - the dealer has assured me that the knock sensor code does NOT cause the Service Engine Light to come on and that if I get the exhaust manifolds/CC replaced that my light will go away. Can anyone tell me if this is indeed true? The vehicle has 125K miles and runs great, so I'm sure the knock sensor code is erroneous and I have no intention of spending $700 to replace it. However, if getting the exhaust manifolds/CC fixed will get rid of my Service Engine light then I'm going to go ahead. Besides, if my CC is gone I may not pass emissions this year.
Any insights or advice would be MOST appreciated! Thanks!