A40004 Mercedes Fault Code :
Read the description of A40004 in MCM21T and the engine lights up for MCM21T - MCM Motor Control Module code, there are some possible causes for it.
The signal voltage of component 10B54: Rail pressure sensor is too low.
Read the description of A40004 in MCM21T and the engine lights up for MCM21T - MCM Motor Control Module code, there are some possible causes for it.
The signal voltage of component 10B54: Rail pressure sensor is too low.
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