Thread: Modern Vehicles and Their Modern Problems

Time for a DPF delete???

What it's telling you is the throughput through the exhaust is not as efficient as what the engine management is programmed to be happy with - which is what Google probably told you. The reason for the regens is the PCM is trying to get the exhaust backpressure back to within the acceptable parameters by increasing the exhaust temp to burn the soot out of the DPF and unblock it, when it can't it shits the bed and throws a tanty. If the issue isn't soot blocking the DPF it will keep thinking the DPF is blocked and initiate another regen.

What sort of driving do you do, the DPF setup wants open road driving and round town short trips are the opposite of what it likes. Why it's thinking the exhaust backpressure is not OK is the million dollar question (probably the wrong phrase but there you go).

Best outcome is a buggered sensor or an electrical issue with a connection or the loom, going to an issue with an injection component or the DPF through to a buggered sensor or even a module on the blink. It really needs to be plugged into something that can look at the live telemetry feed off the OBDII port and see what it's actually doing and where the issue actually is. Worst outcome from this is overloading the lube oil with crap as the regen setup increases the exhaust temperature by increasing fuel and retarding the timing, so it's potentially not good for engine health longterm.