p1135
Moderate
Lexus · Sedans
Oxygen Sensor Circuit Response Bank 1
Quick Answer
Error code P1135 on your Lexus Sedans means: Oxygen Sensor Circuit Response Bank 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect oxygen sensor condition
2
Check sensor wiring and connector
3
Test sensor voltage with oscilloscope
4
Check for exhaust leaks
5
Replace oxygen sensor if needed
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Oxygen sensor
Sensor socket tool
Dielectric grease
Related Error Codes