P2A00 2012 NISSAN ALTIMA SEDAN - Air Fuel Ratio Sensor Circuit Range/Performance Bank 1 Sensor 1
P2A00 2012 NISSAN ALTIMA SEDAN Possible Causes
- Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1
- Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open or shorted
- Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Fuel pressure
- Fuel injector
- Intake air leaks
First diagnose P2A00 2012 NISSAN ALTIMA SEDAN code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
P2A00 2012 NISSAN ALTIMA SEDAN Tech NotesIf the P2A00 code is set after a sensor is replaced, check for exhaust leaks and perform the mixture ratio self-learning procedure.
Cost of diagnosing the P2A00 2012 NISSAN ALTIMA SEDAN code
Labor: 1.0The cost of diagnosing the P2A00 2012 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P2A00 2012 NISSAN ALTIMA SEDAN code detected?The output voltage computed by ECM from the A/F sensor 1 signal is shifted to the lean side for a specified period.
P2A00 2012 NISSAN ALTIMA SEDAN Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P2a00 2012 Nissan Altima Sedan DescriptionThe Air Fuel Ratio (A/F) sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement λ= 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 (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance. An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is able to indicate air/fuel ratio by this pumping of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of 700 - 800°C (1,292 - 1,472°F).
P2A00 2012 NISSAN ALTIMA SEDAN More InformationNeed more information on how to fix the P2A00 2012 NISSAN ALTIMA SEDAN code?
Get Access to Factory Service Manuals
Need more help?Get the P2a00 2012 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area
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