Code Definition

B100C — DPF Additive ECU/Pump Supply Circuit Voltage Out of Range

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

About B100C

B100C is a manufacturer-specific body diagnostic trouble code recorded for Peugeot vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B100C is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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.

B100C 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

Peugeot and Citroen diesel vehicles equipped with a Diesel Particulate Filter (DPF) use a cerium-based additive called Eolys that is injected into the fuel tank from a separate reservoir to lower the regeneration temperature of the DPF. The additive pump ECU is controlled via the Built-in Systems Interface (BSI) body computer, which supplies switched battery voltage to the pump module whenever dosing is required — typically triggered by a refuelling event or a commanded regeneration. DTC B100C is set when the BSI detects that the supply voltage reaching the additive pump ECU is outside its c...

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