![]() How To Repair P0171 Codeīefore starting let's see P0171 repairing process steps: P0171 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission in your car. The reason of P0171 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction. P0171 OBD-II Trouble Code With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxyge P0171 code.Įngine Oil Temperature Sensor Malfunction and Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector) causes most of code P0171. P0171 OBD-II Diagnostic Powertrain (P) Trouble Code Description Optimizing this mixture means better fuel economy and fewer exhaust emissions. The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. 1 Glow Plug/Heater Circuit 'A' Malfunction
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