Code Definition

B1201 — Fuel Sender Circuit Failure

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1201

B1201 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1201 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1201 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

The fuel sender is a float and resistor assembly (or a magnetic Hall effect sensor on some platforms) mounted inside the fuel tank that provides a variable signal to the Body Control Module or instrument cluster, allowing the fuel gauge and low fuel warning to operate. DTC B1201 Fuel Sender Circuit Failure is set when the monitoring module detects an open circuit, a short to ground, a short to voltage, or an out of range resistance on the sender signal wire for longer than a calibrated time. The module expects the signal resistance or voltage to stay within a plausible window (for example 40 t...

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