DTC Detection Logic

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

DTC DETECTING CONDITION AND POSSIBLE CAUSES

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