This bulletin applies to 2016 Dodge Ram 3500 Cab Chassis trucks equipped with a 6.7L Cummins diesel engine.

The following DTCs have been changed from a one-trip fault to a two-trip fault:

P2280...........air flow restriction/leak between the air cleaner and MAP sensor

P203C..........diesel exhaust fluid reductant level sensor circuit low

P208D.........diesel exhaust fluid reductant pump control circuit high

Customers may experience a MIL on and the technician may find the following DTCs set in the PCM memory:

P218F..........reductant no flow detected

P202E..........reductant injector performance

U0001-00.....CAN C bus

P1C55..........NOx sensor intermittent – Bank 1, sensor 1

P24A5..........EGR cooler bypass – Bank 1 control stuck

P207F..........reductant quality performance

P218F..........reductant no flow detected

U110E..........Lost ambient temperature message

Programming will be needed. The following improvements/enhancements are also included in the latest software release:

• Fuel pressure override test improvement for wiTECH
• AC pressure sensor error threshold change
• No-crank/no-start fix
• Ambient air temperature improvements
• Stationary de-soot with wiTECH fix

Using a scan tool (wiTECH), verify that all related systems are functioning as designed. Record and repair as needed before programming. Install a battery charger to keep battery voltage between 13.2 and 13.5 volts.

If DTC U1601 is present, the ECM P/N did not update or the engine did not start after the flash, the flash may have been unsuccessful. Restart the flash update. Reprogram the ECM/PCM with the latest software. Clear all DTCs that may have set in other modules. Perform the PCM Configuration routine in wiTECH, located in the PCM “Misc Functions” menu.