 DTC DETECTION LOGIC
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored not to be shifted to LEAN side or RICH side. 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 shifted to the lean side for a specified period.
- The A/F signal computed by ECM from the A/F sensor 1 signal is shifted 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
| Air fuel ratio (A/F) sensor 1 (bank 2) circuit range/performance
|
 DTC CONFIRMATION PROCEDURE
 1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test. - Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
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 Special Repair Requirement (GT-R certified NISSAN dealer).
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
- Start 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 Diagnosis Procedure (GT-R certified NISSAN dealer). NO >>INSPECTION END
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