P2A00 - P2A00 - O2 SENSOR CIRCUIT RANGE / PERFORMANCE BANK 1 SENSOR 1
POST UPDATED IN January, 2021
Description of DTC code P2A00 Generic
When the P2A00 OBDII diagnostic code is set, it means that the PCM (Powertrain Control Module) has found a voltage reading on the bank's Oxygen (O2) Sensor that is outside the range set by the manufacturer. The number 1 O2 Sensor is located before the Catalytic Converter (TWC).
The Oxygen Sensor circuit usually has an 8-ohm resistor. That voltage should match the battery voltage. Therefore, if a variation of at least 10% more or less than the above resistance occurs, this code will be illuminated next to the Check Engine light.
Symptoms of fault code P2A00 Generic
The Engine Malfunction Indicator (MIL) light is on.
Decreased fuel efficiency.
General loss of engine power.
Other diagnostic codes are stored.
Causes of OBD2 P2A00 Generic
The reasons why the P2A00 OBD2 error code is configured are the following:
The Oxygen Sensor may be defective.
Cables or connectors leading to the O2 Sensor may be damaged.