P2459 Cadillac Diesel Particulate Filter Regeneration Frequency
Possible causes
– Exhaust leak
– Improperly installed or loose Exhaust Gas Temperature (EGT)
– Low engine compression
– Corroed fuel injector
– Water in the fuel system
– Improperly installed or loose Exhaust Gas Temperature (EGT)
– Low engine compression
– Corroed fuel injector
– Water in the fuel system
What about the obd code?
The P2459 Cadillac will set if the Engine Control Module (ECM) detects that the average time between completed regenerations is less than a calibrated threshold.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P2459 Cadillac Description
The particulates in the exhaust gases are collected by the Diesel Particulate Filter (DPF). When the filter becomes saturated with particulates, they are incinerated by a regeneration process. The regeneration process increases the exhaust gas temperature, warning the Diesel Oxidation Catalyst (DOC) first, the warning the DPF. The Engine Control Module (ECM) monitors the system with inputs from two Exhaust Gas Temperature (EGT) sensors 1 and 2 and the exhaust differential pressure sensor.
Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac Catera , Cadillac DTS , Cadillac DeVille , Cadillac STS-V , Cadillac STS , Cadillac Seville , Cadillac XTS , Cadillac XLR , Cadillac XLR Platinum , Cadillac Escalade , Cadillac SRX