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Home >> Saturn >> 2000 >> SL1 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0140: Ho2S Circuit - Insufficient Activity - Sensor 2 >> Diagnostic Aids
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Diagnostic Aids

Use scan tool to review malfunction history diagnostic information. This data can be used to duplicate a problem. Check tightness of harness connector terminals. Normal scan tool readings in closed loop will show the oxygen sensor voltage varying between 100 mV and 999 mV. DTC can set or cause false oxygen sensor readings if the oxygen sensor ground is loose.

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