The P2003 trouble code relates to the diesel particulate filter (DPF) efficiency being below threshold in bank 2.
P2003 Diesel Particulate Filter Efficiency Below Threshold Bank 2
Code symptoms P2003.
1. Decreased engine performance.
2. Reduced fuel efficiency.
3. Increased emissions.
4. The Check Engine Light (CEL) may be illuminated.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2003.
1. Clogged or restricted diesel particulate filter.
2. Faulty exhaust gas temperature sensor.
3. Engine misfire.
4. Fuel system issues.
5. Faulty diesel oxidation catalyst (DOC).
Code Solutions P2003.
1. Inspect and clean or replace the diesel particulate filter if it is clogged or restricted.
2. Test and replace any faulty exhaust gas temperature sensors.
3. Address any engine misfire issues.
4. Ensure the fuel system is operating correctly, checking for issues such as clogged fuel injectors or a malfunctioning fuel pressure regulator.
5. Test and replace the diesel oxidation catalyst if necessary.