OBD2 Automotive Error Code P0135: How to Fix It

Q: Can I drive with P0135 error code?

You can drive short distances with P0135, but the engine may run poorly during cold starts and fuel economy will suffer. The check engine light will remain on, and you may fail emissions testing. It's best to repair it promptly.

Q: How much does it cost to fix P0135?

DIY repair typically costs $50-150 for a new oxygen sensor. Professional repair ranges from $200-400 including parts and labor. Costs vary by vehicle make and sensor accessibility.

Q: What causes oxygen sensor heater failure?

Common causes include normal wear after 60,000-100,000 miles, contamination from engine oil or coolant leaks, physical damage from road debris, electrical issues like blown fuses, or wiring problems from heat and vibration.

Q: Will P0135 cause my car to fail inspection?

Yes, P0135 will typically cause your vehicle to fail emissions testing in most states. The check engine light indicates an emissions-related problem that must be resolved before passing inspection.

Abstract

Error code P0135 indicates a malfunction in the oxygen sensor heater circuit for Bank 1 Sensor 1, which is the O2 sensor located before the catalytic converter on the side of the engine containing cylinder #1. This error means the heater element inside the oxygen sensor isn't working properly, preventing the sensor from reaching its optimal operating temperature quickly during cold starts.