Final answer:
Possible causes of consistently low O₂ sensor readings include a faulty sensor, clogged fuel injectors, exhaust leaks, and incorrect fuel mixture. Consulting an automotive technician for further diagnosis and repair is advised.
Step-by-step explanation:
If the O₂ sensor reading is always low 3, there are a few possible causes that you can consider:
- Faulty O₂ sensor: A malfunctioning O₂ sensor can provide inaccurate readings, including consistently low values. It may need to be replaced to solve the issue.
- Clogged fuel injectors: When fuel injectors are clogged, they may not deliver the correct amount of fuel to the engine, leading to an incorrect air-fuel mixture and low O₂ sensor readings.
- Exhaust leak: An exhaust leak can introduce additional oxygen into the exhaust system, causing the O₂ sensor to read lower values.
- Incorrect fuel mixture: If the fuel mixture is too lean (not enough fuel), the O₂ sensor may read low values consistently.
It's important to note that diagnosing the exact cause of the low O₂ sensor reading requires further inspection and testing. Consulting with a qualified automotive technician would be recommended to accurately identify and resolve the issue.