OBD
P2DD5
Fuel Injection Quantity B Lower Than Expected
What it means
P2DD5 means Fuel Injection Quantity B Lower Than Expected.
Check these first
- Clogged fuel injectors limiting injection quantity B
- A weak fuel pump or low rail pressure
- A clogged fuel filter
- Leaking fuel injector seals
- A faulty fuel quantity sensor
What to do next
- Read fuel injection quantity B on a scan tool
- Check the fuel rail pressure
- Replace the fuel filter
- Test the injector balance
- Repair the low fuel delivery
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.