How to reset DPF after cleaning process. 1. Switch ignition to “ ON ” position. (engine off) 2. Connect the pin in the red circle (in the pic below) to earth (chassis). 3. Press the accelerator to the floor and release 2 times. NB The glow plug light flashes 2 times when resetting is complete. 4. After half-minute of driving at highway speed, the check engine light that is always on starts flashing. Codes are P0301 & P0302, but plugs 1 & 2 look good and plug 3 is carbon-fouled. Upon advice from this forum, I've added a gallon of acetone to a half-tank of gas to clean the injectors, which I haven't checked. Drive to the side of the road and park off the right-of-way on level ground. Turn off the engine and wait 5 minutes for the oil to drain back into the sump. Inspect the engine oil level (Search). If it's low, add the appropriate amount of engine oil while being careful not to overfill. However, when coming back home, they drove at about 80 km/h in a slight uphill, when DPF light came on and soon started blinking and was accompanied by the CEL and a blinking cruise control. When they got home, I connected Torque and found out that soot level was OK at around 40 %, oil dilution at 4 % and ash at 0 %. Here we look at the possible reasons why the Mazda i-stop is not working. Mazda i-stop Amber Light. The amber i-stop warning light illuminates under the following conditions: The system is deactivated by pressing the i-stop OFF button. The bonnet / hood is opened. Driver seat belt removed and door opened. Amber i-stop Light Flashing DPF & Engine Lights. I got my second DPF light this morning; but with an engine yellow light as well. I burned it off, drove for 30-40 minutes at 3000rpm (4th gear out of 6 at 70 - racy but noisy LOL) and the DPF light went out. However - the engine light is NOT out and even after stopping the car all day and then re-starting to drive home Customer: Tried to force a DPF regeneration with diagnostic tool but a message saying "Service reset failed" JA: Anything else you want the Mechanic to know before I connect you? Customer: Its a Mazda 3 NOT Mazda 2 (my typo). It's got DPF soot & ash fault codes & PATS transmitter fault code. Hi I bought a used 2016 Mazda CX3 yesterday, and whilst driving back on the motorway the DPF light started flashing. the car has been driven at least 10,000 miles each year, services and recently pass … read more The DPF light always goes straight to flashing. Each time, I take it back to the dealership, they say it's a problem with the oil dilution counter (not the DPF), they clear the code, reset the counter and then Subaru provides a software update. I get anywhere between 2-5000klms before the DPF light starts flashing again. fUwKw7s.