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For a 2002 Toyota Rav4, what is the most common fix for the P1135 code?

Vehicle: 2002 Toyota Rav4

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P1135 A/F (air flow) sensor heater circuit malfunction, bank 1 sensor 1, The common fix is sometimes the fuse which is in the engine fuse box listed as A/F very rarely its a relay,This is like an Oxygen sensor it does degrade and it does get worn,where the heater circuit wears out.due to mileage, When it comes to heater circuit it usually just that  a worn A/F sensor.

P1135 TOYOTA - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Read more: https://www.autocodes.com/p1135_toyota.html

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