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Old 03-25-2009, 11:38 PM
richyrich
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Well, I think I found it on my own. This was a weird one, especially with no codes to help.

Service Bulletin NTB04-063

Nissan has a bulletin out for a hard hot starting problem on the 3.5L V6 in the early 2004 Maxima and Quest, and 2003-’04 Altima models. The symptom it describes is an engine that starts OK cold, but is hard to start after it has been driven. The check engine light may or may not be on, and DTC codes P0340 (CMP sensor bank 1) and/or P0345 (CMP sensor bank 2) may be present. See Figure 5. In any event, Nissan says the fix is to replace one or both camshaft position sensors. The part number of the rear bank (bank 1) CMP sensor is 23731-65906, and the front bank (bank 2) CMP sensor is 23731-Al616. The CMP sensors are the same type as the CKP sensor, and also cost about $70 each.
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