Overview
2006my changes
There are changes to the engine management system (EMS) for 2006 my, the most obvious of which will be the change to 7-digit diagnostic trouble codes (DTCs) from the familiar 5-digit, plus the addition of secondary air injection and changes to Federal evaporative emissions (Europe is unchanged) and all market exhaust gas recirculation to comply with stage four emissions requirements.
The hardware changes to the Federal evaporative emissions system are the deletion of the canister close valve and the fuel tank pressure sensor, which have been replaced with a combined unit incorporating a DMTL (diagnostic monitoring of tank leakage) pump and a COV (change-over valve) into one module.
The software changes will have more effect on the technician, as there is no longer the need to carry out extensive drive cycles to confirm the success of a repair.