What does code P0231 mean?
Low signal detected in the secondary fuel pump circuit
OBD-II Code
P0231 — Fuel Pump Secondary Circuit Low
Low signal detected in the secondary fuel pump circuit
Common symptoms
- No start
- insufficient fuel pressure
Possible causes
- Poor ground
- faulty harness
- weak fuel pump
Initial recommendation
Check voltage at pump and circuit continuity.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0231 with your vehicle's actual symptoms for more complete diagnostic guidance.
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