Toyota Error Code P1135: How to Fix It

Q: Can I drive my Toyota with error code P1135?

Yes, you can typically drive with P1135, but your vehicle may experience reduced fuel economy and increased emissions. The engine management system will use default values instead of real-time sensor data, which can affect performance. It's best to fix it promptly to avoid potential catalytic converter damage.

Q: How much does it cost to fix Toyota P1135 error code?

DIY repair typically costs $50-150 for a new oxygen sensor. Professional repair can range from $200-400 including parts and labor. The oxygen sensor itself usually costs $50-100, while shop labor rates vary by location.

Q: What causes Toyota P1135 error code?

P1135 is most commonly caused by a failed oxygen sensor heater element, damaged wiring near the exhaust system, corroded electrical connections, or blown fuses in the heater circuit. Heat and age are the primary factors that cause sensor failure.

Q: How long do Toyota oxygen sensors last?

Toyota oxygen sensors typically last 100,000-150,000 miles under normal driving conditions. However, sensors exposed to contaminated fuel, engine misfires, or excessive heat may fail earlier. Regular maintenance and using quality fuel can extend sensor life.

Q: Will Toyota P1135 cause my car to fail emissions testing?

Yes, P1135 will likely cause your Toyota to fail emissions testing. The malfunctioning oxygen sensor affects the engine's ability to maintain proper air-fuel ratios, which directly impacts emissions output. The code must be resolved and the system must complete its readiness monitors before passing inspection.

Abstract

Toyota error code P1135 indicates a malfunction in the air-fuel ratio sensor heater circuit for Bank 1 Sensor 1 (the oxygen sensor before the catalytic converter on the engine side with cylinder #1). This error means the sensor's heating element isn't working properly, which can affect fuel efficiency and emissions. While the vehicle may still run, it's important to address this issue to maintain optimal performance and pass emissions tests.