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The P1135 is set when the Engine Control Module detects a heated oxygen sensor heater circuit malfunction. This could be caused by a faulty air-fuel ratio sensor or a faulty engine control module.

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10y ago

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P1135 - Air-Fuel Sensor Heater Circuit Response.

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18y ago
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Code P1135 means air/fuel sensor heater circuit response (bank 1 sensor 1)

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17y ago
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they have to do with the air/fuel sensors that read the ratio of oxygen going into your fuel

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15y ago
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Q: What does code p1135 on Toyota Sienna ce 2002 mean?
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