Find out what P0046 means, its causes, and how to fix it. Follow our easy guide to resolve P0046 and restore your equipment to optimal performance.
P0046 is a generic diagnostic trouble code (DTC) indicating an issue with the Oxygen Sensor Heater Control Circuit Low (Bank 2, Sensor 2). This code means that the oxygen sensor heater circuit on Bank 2, Sensor 2 is receiving a low signal, which can prevent the sensor from heating properly and cause poor engine performance, increased emissions, and reduced fuel efficiency.
The P0046 code can be caused by:
To resolve the P0046 code, follow these steps:
To prevent the P0046 fault code:
Ensure connectors are free of corrosion and securely connected.