P0017 TOYOTA Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B

Possible causes – Faulty Variable Valve Timing (VVT) sensor– Dirty Oil– Variable Valve Timing (VVT) sensor circuit is open or shorted– Variable Valve Timing (VVT) sensor poor electrical connection– Damaged ECM When is the code detected? The Engine Control Module

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P0171 2006 TOYOTA COROLLA Air/Fuel Mixture System Lean Bank 1

Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes

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P0171 2005 TOYOTA COROLLA Air/Fuel Mixture System Lean Bank 1

Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes

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P0116 TOYOTA Engine Coolant Temperature Circuit Range/Performance Problem

Possible causes – Low engine coolant level– Faulty Engine Coolant Temperature (ECT) sensor– Faulty engine coolant thermostat– Engine Coolant Temperature (ECT) sensor harness is open or shorted– Engine Coolant Temperature (ECT) sensor circuit poor electrical connection When is the code

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P0125 TOYOTA Insufficient Coolant Temperature for Closed Loop Fuel Control

Possible causes – Low engine coolant level– Leaking or stuck open thermostat– Faulty Engine Coolant Temperature (ECT) sensor– Engine Coolant Temperature (ECT) sensor harness is open or shorted– Engine Coolant Temperature (ECT) sensor electrical circuit poor connection Tech notes There

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