Multi-code OBD2 diagnosis
Enter all the codes your scanner showed, not just the first one. We give you the overall severity, whether you can keep driving, the order in which to check them and how they relate to each other.
Summary
- Overall severity
- Medium
- Can I keep driving?
- Yes, no immediate risk
- Estimated cost
- $80 to $350
- Codes analyzed
- 1 of 1
The order below is the recommended one: first the codes that can cause the others. After each repair, clear the codes and check which ones come back.
Order of inspection
P1155 Air Fuel Ratio Sensor Heater Circuit (Toyota, Bank 2 Sensor 1) Medium
On Toyota and Lexus, the P1155 code points to the heater circuit of the air fuel ratio sensor (bank 2 sensor 1). Fuel use goes up and the mixture is no longer controlled precisely. The heater usually fails from age or a blown fuse.