O2 Sensor Circuit Range/Performance Bank 1 Sensor 1
Table of contents
P2A00 Possible Causes
- Air fuel ratio (A/F) sensor 1
- Air fuel ratio (A/F) sensor 1 heater
- Fuel pressure
- Fuel injector
- Intake air leaks
How do I fix code P2A00?
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 connector’s pins.
Cost of diagnosing the P2A00 code
The cost of diagnosing the P2A00 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P2A00 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.
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).
