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Home >> Pontiac >> 2003 >> Sunfire Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P0140: Ho2S Circuit Insufficient Activity - Sensor 2 >> Test Description

Test Description

The numbers below refer to the step number in the diagnostic procedure.

  1. 2  - An HO2S heater fault may set this DTC.
  2. 3  - If the voltage is varying above and below the specified value, the condition is not present.

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