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One problem after the next. I repaired vacuum leak. No longer get codes p0171 and p0174. P1449 was also cleared after vacuum leak fix. 260 miles later code P1449 is back. It’s the only code I have confirmed and pending using OBD fusion. Reading most posts and around the web changing out the DTML seems the option. My engine is M56. I confirmed that much. I’d appreciate any solutions
 
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