Diesel Exhaust Fluid System Anti-Tampering Feature

Detroit Diesel Electronic Controls (DDEC^®) monitors for faults in DEF system components and monitors the DEF supply pressure. If DDEC ® detects that components critical to the ATS or DEF supply system are disconnected (which could indicate tampering), or if the diagnostics detect abnormal system pressures indicative of DEF supply blockage, the warning indicator will illuminate and DDEC ® will initiate time and mileage counters. If the sensors detect that the ATS has been tampered with, the malfunction indicator illuminates to warn the driver, and the engine performance is limited, with a 90 km/h (55 mph) speed limit. If the system fault is not corrected, the stop engine indicator illuminates and an 8 km/h (5 mph) speed limit will be applied. Similar warnings and penalties will result when insufficient DEF quantity is present.