Recently i have problem with my Regeneration .Have fault code "mid 128 pid 81 fmi 12" and find out this code is for Particulate trap pressure sensor (PTP sensor). My question is where is located this sensor ,and can i replaced by myself
Check the sensor plug first. Sensor is located on the DPF, easy to replace. Unscrew two 10 mm bolts, release clamps from the rubber hoses and take it out.