2023 Lexus P0133: What It Means & Is It Safe to Drive?
P0133 on the 2023 Lexus: O2 Sensor Slow Response (Bank 1, Sensor 1). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The upstream oxygen sensor on Bank 1 is responding too slowly to changes in exhaust composition. A healthy O2 sensor switches between rich and lean several times per second; a sluggish sensor causes poor fuel control.
Common causes on the 2023 Lexus
- Aging or contaminated upstream oxygen sensor
- Oil or coolant contamination fouling the sensor
- Carbon buildup on the sensor tip
- Weak heater circuit in the sensor
Symptoms
- Check Engine Light
- Slightly decreased fuel economy
- Possible rough idle
- Failed emissions test
Typical fixes
- Replace upstream oxygen sensor
- Check for oil/coolant burning that could foul new sensor
Repair cost range
For a 2023 Lexus, repairs for P0133 typically fall between $100 and $300, depending on the root cause and labor rates in your area.
Known issues on Lexus
Lexus 2GR-FE and 2AR-FE P0133 upstream sensor aging past 100k miles—use a Denso OEM sensor. Lexus engine management systems are sensitive to sensor response time; aftermarket sensors that technically work may still produce intermittent P0133 codes.
Most commonly affected models