DTC Detection Logic

To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored so it will not shift to LEAN side or RICH side.

DTC DETECTION LOGIC

DTC No.	Trouble diagnosis name (Trouble diagnosis content)	DTC detecting condition	Possible cause
P2A00	A/F SENSOR1 (B1) (Air fuel ratio (A/F) sensor 1 (bank 1) circuit range/performance)	The output voltage computed by ECM from the A/F sensor 1 signal shifts to the lean side for a specified period. The A/F signal computed by ECM from the A/F sensor 1 signal shifts to the rich side for a specified period.	A/F sensor 1 A/F sensor 1 heater Fuel pressure Fuel injector Intake air leaks
P2A03	A/F SENSOR1 (B2) (Air fuel ratio (A/F) sensor 1 (bank 2) circuit range/performance)