Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Hyundai >> 2007 >> Sonata SE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3.3L) (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P2A03 O2 Sensor Not Ready (Bank 1 / Sensor 2) >> DTC Description

DTC Description

Detect when the oxygen sensor reading has forced closed loop fuel control to stop executing, and Open Loop fuel control is in effect. This action will happen for OSP (flat plate) oxygen sensors that are not yet warmed up when the pumping current is in use. The California Air Resources Board (CARB) will not approve the current strategy without this modification. CARB considers this Open Loop operation to be a "default mode of operation," and thus CARB expects the Malfunction Indicator Lamp (MIL) to be illuminated.

Checking output signals from B1S1 every 12 sec. under detecting condition, if an output signal is near 3.5V for more than 10 sec, PCM sets P2A03. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till 1 driving cycle.

scientia non olet · About Mike's Workshop Manuals