Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 1.6L Engine - DTCS B2277 To P0131, Diagnostic Code Index, Pre-Diagnostic Troubleshooting Procedure & Intermittent Condition >> Diagnosis And Testing >> P0031-1/1 O2 Sensor Heater Circuit Low >> Circuit Schematic