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Home >> Volvo >> 2007 >> C70 Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control Module (CCM) And Combustion PREHEATER Module (CPM) Diagnostic Trouble Codes >> CPM-3402: Flame Sensor. Signal Too Low >> Signal Too Low >> Verification

Signal Too Low: Verification

HINT: After carrying out the repair, check that the fault has been remedied. 

Fig 1: Identifying Ignition ON
GLL101051Courtesy of VOLVO CARS CORPORATION
Fig 2: Checking Connector
GLL101069Courtesy of VOLVO CARS CORPORATION

Does the temperature rise at the flame sensor?