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, but with caution
- Estimated cost
- $50 to $400
- 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
P0135 O2 Sensor Heater Circuit (Bank 1 Sensor 1) Medium
The P0135 code means the heater inside the oxygen sensor ahead of the catalytic converter is drawing the wrong amount of current. Most often the heating element has gone open with age, though a blown fuse, a bad relay or damaged wiring can cause it too. You can usually keep driving with some caution, but fuel economy suffers and the car will not pass an emissions test until the monitor completes.