OBD-II Code
P2003
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$220–$4,800
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P2003 is the Bank 2 mirror of P2002 and only sets on V-configuration diesels with twin DPFs or dual-bank pre/post pressure sensors, indicating the right-bank filter is reading below its modeled trap efficiency.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP2003 is the Bank 2 mirror of P2002 and only sets on V-configuration diesels with twin DPFs or dual-bank pre/post pressure sensors, indicating the ri…
P2003 is the Bank 2 mirror of P2002 and only sets on V-configuration diesels with twin DPFs or dual-bank pre/post pressure sensors, indicating the right-bank filter is reading below its modeled trap efficiency.
Cheapest-first ladder
- compare Bank 1 versus Bank 2 differential pressure side-by-side at idle and at 2000 rpm under load, since a healthy pair tracks within 1 kPa of each other; if Bank 2 reads notably lower the substrate side is cracked or the sample tube is loose, and if Bank 2 reads notably higher you have asymmetric soot loading from a Bank 2 injector overfueling.
- Pull Bank 2 fuel trims and injector balance rates (acceptable window is plus or minus 4 mg/stroke at idle), then run a bidirectional forced regen and confirm post-DPF temp on Bank 2 reaches 600 C without lagging Bank 1 by more than 30 C. Caveat: do not replace the right-bank DPF until you have ruled out a leaking Bank 2 EGT sensor port or a sooted Bank 2 turbo seal pushing oil through the filter, because both produce the same code.
Vehicle-specific patterns2011 to 2014 Ford 6.7L Powerstroke Super Duty trucks set P2003 from a Bank 2 EGT 13 sensor leaking at the bung, masking real Bank 2 temps; 2014 to 20…
- 2011to 2014 Ford 6.7L Powerstroke Super Duty trucks set P2003 from a Bank 2 EGT 13 sensor leaking at the bung, masking real Bank 2 temps;
- 2014to 2018 Ram 1500 EcoDiesel 3.0L cracks the rear DPF substrate from short-trip use;
- 2010to 2016 Mercedes Sprinter 3.0L OM642 BlueTEC sets P2003 when the right-bank pressure line collapses internally;
- 2017to 2020 Ford F-450/F-550 6.7L PSD fleet trucks set the code from a sooted Bank 2 turbo VGT actuator.
Estimated repair$220 to $4,800.
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