Code Definition

C0804 — ABS/ESP Control Module Communication Fault

System: Chassis  |  Type: Generic (OBD-II Standard)  |  Make: Mercedes-Benz

About C0804

C0804 is a generic (obd-ii standard) chassis diagnostic trouble code recorded for Mercedes-Benz vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

Because C0804 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The ABS/ESP control module communicates with other vehicle control modules via the CAN bus network to coordinate braking, traction control, and electronic stability functions. Code C0804 is set when the ABS/ESP control module detects a communication fault or data integrity error within its internal or external communication circuits. This code was found alongside related ABS/ESP codes C0736 and C0759 on a Mercedes-Benz Sprinter, suggesting a broader issue with the ABS/ESP control module or its communication pathways. When this code is set, the ABS and ESP warning lights will illuminate and the...

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