Lexus Acura Error Code P1135: How to Fix It

Q: Can I drive with code P1135?

You can drive short distances with P1135, but prolonged driving may cause poor fuel economy and potential catalytic converter damage. The vehicle may fail emissions testing and experience rough idling.

Q: How much does it cost to fix P1135?

DIY repair costs $80-200 for a new oxygen sensor. Professional repair typically costs $200-400 including labor. Costs vary by vehicle model and local labor rates.

Q: What causes oxygen sensor heater failure?

Common causes include normal wear after 80,000-120,000 miles, contamination from oil leaks or coolant, damaged wiring from heat exposure, or electrical shorts in the heater circuit.

Q: Will P1135 cause my car to fail inspection?

Yes, P1135 will typically cause your vehicle to fail emissions testing in states that require it. The code must be resolved and the readiness monitors must complete before passing inspection.

Q: How long do oxygen sensors last?

Oxygen sensors typically last 80,000-120,000 miles under normal conditions. Sensors in vehicles with engine problems or poor maintenance may fail sooner due to contamination.

Abstract

Error code P1135 indicates a problem with the air/fuel (A/F) sensor heater circuit in Bank 1, Sensor 1 of your Lexus or Acura vehicle. This heater helps the oxygen sensor reach operating temperature quickly for accurate fuel mixture readings. When this circuit fails, your vehicle may experience poor fuel economy, rough idling, and increased emissions.