This TSB applies to 2010-2012 Ram 2500 and 3500 trucks and 2011-2012 Ram 3500/4500/5500 Cab Chassis vehicles, all equipped with the 6.7L Cummins diesel engine.
A DTC P0471 may be set in below-freezing temperatures. This bulletin involves installing an insulated exhaust manifold pressure (EMP) sensor tube and insulation over the EMP sensor, along with a new EMP sensor.
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 operated 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). The DTC will illuminate the MIL immediately after the fault becomes active.
68002442AA…………………Sensor, exhaust manifold pressure
68175216AA…………………Kit, exhaust manifold pressure sensor insulating
- Install the exhaust manifold pressure sensor insulating kit and a new exhaust manifold pressure sensor. Refer to the instruction sheet provided with the kit.
- Connect the diagnostic scan tool and erase the DTC(s). Start the engine while monitoring DTCs to verify that P0471 does not return.