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Toyota
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1995
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T100 Base
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes - 2.7L
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Diagnostic Testing
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Code P0135 - Heated Oxygen Sensor (Front Sensor) Circuit
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Possible causes are:
Possible causes are:
Heated oxygen sensor open or short circuit.
Heated oxygen sensor heater.
ECM.