Frozen Cummins

This TSB applies to 2010-2012 Dodge Ram 2500/3500 and 2011-2012 Ram 3500/4500/5500 Cab Chassis vehicles, all equipped with the 6.7L Cummins diesel engine.

During the normal combustion process, condensation can form in the EMP sensor tube. Rarely, this condensation may contact the EMP sensor pressure sensing element. If the vehicle is operating in temperatures below freezing, the condensation  may freeze. The expanding moisture as it freezes could cause the pressure sensing element to crack causing damage to the EMP sensor and setting DTC P0471 (exhaust pressure sensor 1 performance). DTC P0471 will illuminate the MIL immediately after the fault becomes active.

If the MIL illuminated for DTC P0471 and temperatures are below freezing or recently have been below freezing, perform the repair procedure.


68002442AA………….sensor, exhaust manifold pressure

68175216AA………….kit, exhaust manifold pressure sensor insulating


  1. Install the exhaust manifold pressure sensor insulating kit (P/N 68175216AA) and a new exhaust manifold pressure sensor (P/N 68002442AA).
  2. Connect the diagnostic scan tool and erase the DTCs. Start the engine while monitoring DTCs to ensure that P0471 does not return.
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