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Home >> Volvo >> 2007 >> V70 Base, 2.4 64 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Ignition And Control Systems - Design And Function) >> Diagnostic Functions Me7 (B5234T3, B5244T3) >> Probe diagnostics >> Front heated oxygen sensor (HO2S), preheating

Front heated oxygen sensor (HO2S), preheating

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Checking that the heating circuit begins after dew point has been reached. The control module registers an electrical fault and checks the probe's λ value. A diagnostic trouble code (DTC) for a faulty signal is stored if the value deviates from 1 within a set time after the control module interprets that heated oxygen sensor (HO2S) preheating is not working.

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