It could be two problems
1st- The PGM-FI software misinterprets inputs, causing the
DTCs to set. Need to bring it to the dealership and have them update the PGM-Fi software.
2nd- If the engine taps/raps loudly when going into VCM mode it will causes misfire codes. The rear bank VCM rocker arm pins sticking. In this case the rear intake and exchaust rocker arms needs replacement.
Most likely you only need the PGM-FI software update.
Friday, December 3rd, 2010 AT 7:44 AM