do you mean this one
20123 2008 F-SUPER DUTY - 6.4L - P0401/P0402/P2002/P244A/P2453/P2455 AND/OR DPF DAMAGE CAUSED BY AFTERMARKET EQUIPMENT
SOME 2008 6.4L DIESEL VEHICLES MAY SET DTC P0401,P0402,P2002,P244A, P2453, P2455 OR HAVE A DAMAGED DPF/DOC (BLACK SOOT IN TAIL PIPE, BLACK OR WHITE SMOKE) RESULTING FROM AFTERMARKET MODIFICATIONS. BEFORE PROCEEDING WITH NORMAL DIAGNOSTICS, INSPECT THE VEHICLE FOR NON-APPROVED AFTERMARKET AIR INDUCTION SYSTEMS, AND OR AFTER DOC/DPF EXHAUST SYSTEMS OR ELIMINATION OF THE DOC/DPF AND OR PERFORMANCE ENHANCING PROGRAMS. THE USE OF NON APPROVED AFTERMARKET AIR INDUCTION SYSTEMS CAN ALSO CONTAMINATE THE MAF SENSOR, AND CAUSE INACCURATE EGR OPERATION AND FALSE DIAGNOSTICS CODES. REPLACEMENT OF FACTORY COMPONENTS WILL NOT RESOLVE THESE CONCERNS, AND SHOULD NOT BE ATTEMPTED OR COVERED UNDER WARRANTY. PLEASE REFER TO THE WARRANTY AND POLICY MANUAL, SECTION 3, FOR WARRANTY IMPLICATIONS OF REPAIRS RELATED TO VEHICLE MODIFICATIONS.
EFFECTIVE DATE: 02/05/2008