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Home >> Suzuki >> 2003 >> Vitara 4D Utility, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0037 Or DTC P0038 >> Condition
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DTC P0037 Or DTC P0038: Condition

DTC P0037 is set when Engine Control Module (ECM) detects Heated Oxygen Sensor No. 2 (HO2S-2) heater circuit voltage input is higher than 13.63 volts while HO2S-1 heater is ON. DTC P0038 is set when ECM detects HO2S-2 heater circuit voltage input is lower than 0.70 volt while HO2S-2 heater is ON. MIL is illuminated when ECM detects either malfunction during 2 consecutive drive cycles. Possible causes are:

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