18-012-26 REV.A

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P0072-00 - Ambient Air Temperature Sensor Circuit "A" Low.
• P0087-00 - Fuel Rail Pressure Too Low.
• P2540-00 - Low Pressure Fuel System Sensor Circuit Range/Performance.
• P2543-00 - Low Pressure Fuel System Sensor Circuit Intermittent.
• P20EE-00 - SCR Nox Catalyst Efficiency Below Threshold - Bank 1 Catalyst 1.
• P203F-00 - Reductant Level Too Low.
• P2698-00 - Exhaust Aftertreatment Fuel Injector "A" Performance.
• P06B9-00 - Cylinder 1 Glow Plug Circuit Performance.
• P06BA-00 - Cylinder 2 Glow Plug Circuit Performance.
• P06BB-00 - Cylinder 3 Glow Plug Circuit Performance.
• P06BC-00 - Cylinder 4 Glow Plug Circuit Performance.
• P06BD-00 - Cylinder 5 Glow Plug Circuit Performance.
• P06BE-00 - Cylinder 6 Glow Plug Circuit Performance. Customers may also comment on one or more of the following:
• Diesel Exhaust Fluid (DEF) level gauge inaccuracy.
• Poor cold start performance.
• Unable to initiate manual Diesel Particulate Filter (DPF) regen through Electronic Vehicle Information Center (EVIC).
• While using the remote Power Take-Off (PTO) feature, the PTO may not engage or resume operation properly, after disengaging: 1. Engine is running with PTO engaged. 2. Operator is using the equipment, for example a bucket attachment. 3. Operator gets in position, then uses remote start/stop button to turn truck off while they perform a task. 4. The task is completed, then operator is ready to move the bucket so they use remote start/stop to start the engine. 5. The engine starts but PTO does not automatically re-engage so the equipment doesn’t operate. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.