Nissan Versa
Sedan Service Manual
Engine » Engine control system (EC) » P2096, P2097 A/F sensor 1
DTC Logic

DTC DETECTION LOGIC

DTC No.	Trouble diagnosis (Trouble diagnosis content)	DTC detecting condition	Possible cause
P2096	POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim systemtoo lean bank 1)	The output voltage computed by ECM from the A/F sensor 1 signa is shifts to the lean side for a specified period.	A/F sensor 1 A/F sensor 1 heater Heated oxygen sensor 2 Fuel pressure Fuel injector Intake air leaks Exhaust gas leaks
P2097	POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim systemtoo rich bank 1)	The A/F signal computed by ECM from the A/F sensor 1 signal is shifts to the rich side for a specified period.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

Clear the mixture ratio self-learning value. Refer to EC, "Work Procedure".
Turn ignition switch OFF and wait at least 10 seconds.
Restart engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load.
Let engine idle for 1 minute.
Keep engine speed between 2,500 and 3,000 rpm for 20 minutes.
Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Go to EC, "Diagnosis Procedure".

NO >> INSPECTION END

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DTC Logic