P2BB3Fuel Pump Secondary Circuit Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Where a separate driver module powers the fuel pump, the ECM sends a duty-cycle command and the module reports what it actually applies. P2BB3 means these two values disagree beyond a tolerance, so the pump is not running at the requested speed although no open or short has been found. GM documents this in its 2018 engine tables (18OBDG04) for vehicles with a fuel tank zone module: its fuel pump driver control module compares measured with received duty cycle every 12.5 ms once ignition voltage exceeds 6 V, sensor-bus data are valid and P0231, P0232, P023F and the driver overtemperature fault P1255 are absent; Type A, MIL on the first trip. Ford's petrol summary checks the pump secondary circuit only with P0231/P0232 and its own P1237. Expect weak fuel pressure.
- What you may notice
- MIL on
- Hesitation or power loss under load
- Long cranking or stalling
- Likely causes
- LikelyFuel pump driver or tank zone module not delivering the commanded output
- PossibleHigh resistance in the pump supply or ground connection
- PossibleWorn or binding fuel pump drawing abnormal current
- RareDisturbed data link between ECM and pump module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.