Nissan GT-R (R35) · Service Manual ENGINE

P2A00, P2A03 A/F SENSOR 1

VR38

P2A00 P2A03

Description


The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor. The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a heater in the element.

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The sensor is capable of precise measurement = 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density in rich.

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this electrode layer of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of about 800°C (1,472°F).

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DTC Logic

 
 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
 
 2.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK GROUND CONNECTION
 
 2.RETIGHTEN A/F SENSOR 1
 
 3.CHECK FOR INTAKE AIR LEAK
 
 4.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
 
 5.CHECK HARNESS CONNECTOR
 
 6.CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT
 
 7.DETECT MALFUNCTIONING PART
 
 8.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 9.CHECK A/F SENSOR 1 HEATER
 
 10.CHECK INTERMITTENT INCIDENT
 
 11.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
 
 12.CONFIRM A/F ADJUSTMENT DATA
 
 13.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
 
 14.CONFIRM A/F ADJUSTMENT DATA