04/01/2025
Time and time again the Dpf is always blamed as the problem without proper diagnosis the customer is always the best source of information if you ask the right questions you will get to know what’s going on
Carrie called me when she was told by two garages she had a Dpf problem both garages had tried to do a forced regeneration but the ecu rejected the command. When I looked at the vehicle I did an initial code scan and spoke to Carrie who told me that the car doesn’t accelerate properly it’s like it’s got an anchor attached to the back, the codes I had was for glow plug control which needed the glow plugs testing, but no fault codes for Dpf so I looked in the live data and saw that any info for Dpf was at zero and Carrie confirmed to me that she hadn’t driven the car since the last garage looked at it so I assumed that the Dpf data had been reset.
So the plan was to recover the car to the workshop and do further tests once on the ramp and the lower engine cover was removed it was so clear that his scenic was not fitted with a Dpf and had never had one in its life so this made the plot thicken, on the passenger seat was a diagnostic scan report from one of the previous garages and on that the answer was there low fuel pressure when I looked at the fuel pipes i could see that there was insufficient fuel flowing to the rail i sent Carrie a video of what was happening and what I suspected and to ask for authority to service the vehicle. Once I got the fuel filter out it was the original filter from when it was built in 2009 the fuel filter was 15 years old and never changed all because it was located in an awkward position
Moral of this story it’s not always the Dpf at fault and sometimes just need to take a look at the engine
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