The engine computer has detected an improper resistance value in the heating element of the Bank 1 Sensor 1 oxygen sensor. This heater is designed to quickly bring the sensor to its operating temperature to ensure accurate emissions monitoring.
The internal heating element within the oxygen sensor has burned out or developed an open circuit.
The heater circuit wires are frayed, shorted, or broken due to heat, abrasion, or corrosion.
The fuse protecting the oxygen sensor heater circuit has failed, cutting power to the element.
Moisture or debris in the sensor connector has caused high resistance or a poor electrical connection.
The engine control module has an internal fault in the heater control circuit.
Yes, the vehicle remains drivable, but it may operate in a less efficient mode until the sensor naturally reaches temperature via exhaust gases.
No, the heater is integrated into the oxygen sensor assembly; the entire sensor must be replaced if the element fails.
No. It is very rare for P0053 to be caused by the PCM. In almost all cases, the issue is the sensor itself or the associated wiring.