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Toyota p1135, p1155
What are the odds? that the heater circuits for both front A/F (o2s) sensors are bad at the same time? Neither is open circuit. both codes are set. I also have a Tundra here 4.7l with the same codes... both front A/F sensor heater circuit faults..... ??? same ... Login to read more. 
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| Engine | 3.0 L |
| Trans | 4-speed Automatic (Electronic) |
| Symptoms | Mil Lamp On |
Vehicle Data
2001 Toyota Sienna LE 3.0L Mil Lamp On
| Engine | 3.0 L |
| Trans | 4-speed Automatic (Electronic) |
| Symptoms | Mil Lamp On |
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