P2065Fuel Level Sensor B Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Sensor B is the second fuel level sender, used where one sender cannot cover the whole tank: the passive half of a saddle tank, a secondary tank on dual-tank trucks, or the secondary lever-type sender that Mercedes reads through its fuel pump module. Ford explains the saddle layout: a jet pump moves fuel to the active side, and both readings are averaged into one gauge value. P2065 is the general circuit code for this input, meaning an electrical fault not classified as low, high or intermittent. Ford's 2014 Boss 302S code list marks P2065 as a MIL code, and the 2024 Ford OBD summary uses P2065 as the base code for failure types such as -11, -12, -1C and -2A. CARB expects fuel level inputs to be monitored, because misfire and evaporative checks are suspended at low levels. Gauge and low fuel warning may mislead.
- What you may notice
- Fuel gauge reads wrong, stuck or jumps
- Low fuel warning comes on with a full tank or not at all
- MIL on, evaporative monitor may not complete
- Likely causes
- LikelyLoose or corroded connector at the second sender or pump module
- PossibleBroken wire between sender and the module that reads it
- PossibleWorn or failed sender card in the tank
- RareControl module software that does not match the tank layout
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.