P0135
O2 Sensor Heater Circuit Bank 1 Sensor 1
Powertrain · Generic (all makes)System: Electrical/Circuits + Emissions
Safe to drive short term. Book a repair.
Likely causes
- Failed heater inside the front oxygen sensor
- Blown heater fuse or broken wire
What to check first
Check the O2 heater fuse and connector, then replace the bank 1 sensor 1 oxygen sensor.
Typical repair cost
$100 – $350
Independent-shop parts and labor for the usual fix. Your price depends on the actual cause and the vehicle.
Next step
General information, not a diagnosis of your vehicle. Repair costs are typical shop ranges, not quotes.