Code Definition

P115B — Low Fuel Level – Forced Engine Shutdown

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Ford

About P115B

P115B is a manufacturer-specific powertrain diagnostic trouble code recorded for Ford vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P115B is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P115B is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

On these Ford vehicles the Powertrain Control Module (PCM) monitors the fuel level sensor to determine the fuel volume available. DTC P115B sets when the PCM detects the fuel level has fallen below a critical threshold for a defined period, a more severe condition than the low fuel power limit, indicating an imminent fuel starvation risk. In response the PCM commands a forced engine shutdown strategy to protect the high pressure fuel system and prevent air ingestion or pump damage from running dry. This code is typically set when the PCM confirms a valid critically low fuel signal with no sens...

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