TuningBot DTC Database · v4.37.15

P1904 Mercedes-Benz - CAN data bus, TCM/instrument panel - malfunction

Manufacturer-specific interpretation for Mercedes-Benz. All interpretations of P1904

P · PowertrainTransmissionOBD2

What P1904 means

P1904

CAN data bus, TCM/instrument panel - malfunction Mercedes-Benz · transmission Data confidence 62%

The control module detected improper operation of the CAN data bus, TCM/instrument panel. This is the manufacturer-specific definition used by Mercedes-Benz.

Possible causes

Wiring
trouble code(s) stored in other system(s)

Related and nearby codes

P19 range

P1900 P1901 P1902 P1903 P1905 P1906 P1907 P1908 P1909 P1910 P1911 P1912 P1913 P1914 P1915 P1916 P1919 P1920

How to read P1904

Powertrain: engine, transmission and driveline systems.

Manufacturer-defined range: the meaning can differ between brands.

904

Specific fault index within the subsystem.

Frequently asked questions about P1904

What does P1904 mean?

CAN data bus, TCM/instrument panel - malfunction. The control module detected improper operation of the CAN data bus, TCM/instrument panel. This is the manufacturer-specific definition used by Mercedes-Benz.

Is P1904 generic or manufacturer-specific?

P1904 is a manufacturer-specific code. In this database it is documented for: Mercedes-Benz. The same number can mean something different on other brands.

Can TuningBot remove P1904 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 Tuning DPF Removal EGR Removal AdBlue / SCR Removal DTC Removal IMMO OFF Speed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

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