painej
New member
I own a 2007 Dodge Sprinter, 3.0 L V6 (diesel) engine, with just a tad over 300k mi. The CEL is lit. Using the Autel 808, the code is P2626 with no other codes. I just did a test drive while recording exhaust back pressure and differential pressure at differing engine speeds. I've done a pretty extensive online search, but haven't seen much hard information on expected values for an operational DPF. Here mine are, in case anyone would like to weigh in on where these fall relative to a "normal" range:
At idle (770 rpm): exhaust back pressure 1201 hPa (17 psi); DPF differential pressure 12 hPa (0.2 psi).
At 2910 rpm: exhaust back pressure 1750 hPa (25 psi); DPF differential pressure 43 hPa (0.6 psi).
I've seen back pressures as high as 2070 hPa (30 psi) and differential pressures as high as 63 hPa (0.9 psi).
So the question is: do these numbers suggest a clogged DPF? I recently replaced the dpf pressure sensor for unreasonable reported values, and it appears to be functional now. The van runs well, is regularly getting 20-21 mpg, and isn't in limp mode. The ECU is reporting ash content at 0 (seems unrealistic) and soot content at 0.6 g/l.
Thanks in advance for any guidance or links to other discussions I might have missed! I know this is a well-worn general topic among Sprinter owners.
At idle (770 rpm): exhaust back pressure 1201 hPa (17 psi); DPF differential pressure 12 hPa (0.2 psi).
At 2910 rpm: exhaust back pressure 1750 hPa (25 psi); DPF differential pressure 43 hPa (0.6 psi).
I've seen back pressures as high as 2070 hPa (30 psi) and differential pressures as high as 63 hPa (0.9 psi).
So the question is: do these numbers suggest a clogged DPF? I recently replaced the dpf pressure sensor for unreasonable reported values, and it appears to be functional now. The van runs well, is regularly getting 20-21 mpg, and isn't in limp mode. The ECU is reporting ash content at 0 (seems unrealistic) and soot content at 0.6 g/l.
Thanks in advance for any guidance or links to other discussions I might have missed! I know this is a well-worn general topic among Sprinter owners.
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