DPD light comes on and Engine check light on every time

You must bring it in for repairs before it goes into Limp Mode. Something is wrong with your Isuzu. The RPMs during regen shouldn't be any higher than 2,500. This process usually takes 30 to 45 minutes. I suspect there may be a problem with the vehicle's computer. 7,000 RPMs is too high.

run the fault codes , find the cause and fix the fault

Dpf is diesel particulate filter what make model year?

get is serviced.
or read the FSM on car.
2 choices.

or
Diesel Particulate Filter
needs attention. "serviced"

You need to take your truck into a repair shop so they can read the code on their reader. You do not want to drive your vehicle with the check engine light on without knowing what the problem is. The lights are on because there is a problem; they should go off once the problems are fixed.

u may only hav a soft code and it dissapears--u can bring it to a partsplace and theyl scan the car-but runnin a data stream that shows values or voltages will pinpoint the issue-go to an independent shop not a dealer--

in hiace kdh201 have 5 pin socket under the left hand side in dash panel. find it and red/yellow wire connect with ground after 2s it will start to flushing ,some time it want to more than one flushing to clean DPF filter.be careful because this white smoke cause to censers and don't operate A/C ,headlight,and accelerate position .it will stop your DPF cleaning process.good luck

call douggy from trucktech he can bypass the system

this can be a big problem so will start on easiest first. and try to repair as going, the passenger door the problem with this could be the solenoid for the door lock. and or the switches in the lock. driver door has the same but is the master door. ie if you open door from unlocking at pass door it will only open this door, drivers side will open all doors. flashing hazards this could be because the alarm is not completely turned off this could be because of the doors, mainly the drivers side. try to find the fault with the door lock and get back to me when you have found the fault. you will need a meter to check for volts and the switches, check them as lock unlock from the inside and the key to make sure they working. dpd spray should be able to clean them if you can spray into the lock and housing that is plastic. give a good flush out after its working wipe up the mess from the spray and mear grease on the lock moving parts.

Dpd light on and check engine light on