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Home >> Chevrolet >> 2002 >> Cavalier Base, 2D Coupe, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls Self-Diagnostics - 2.2L CNG) >> Diagnostic Tests >> DTC P0134: O2S1 Circuit - Insufficient Activity >> Conditions For Setting DTC

Conditions For Setting DTC

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The AF ECM monitors an O2S signal voltage stuck between 0.347 volt and 0.550 volt (inactive) for 9 seconds continuously or the AF ECM monitors an O2S signal voltage between 0.00 volts and 1.0 volt that has not performed a Rich/Lean switch for 15 seconds continuously.

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