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Expert Automotive and OBDII Repair Information with AI Assistance. Please type your question or enter an OBDII code for AI-driven insights. For example, you could ask, 'What does a bad ECM mean?' or 'What is the P0420 code?' or 'Infiniti G37 window not opening.'.
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The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are a common cause of multi-cylinder misfiring. If no leaks are found the next step is to replace the spark plugs.
The P0171 diagnostic trouble code indicates that the fuel system is running lean on bank 1 of the engine. This means that there is an imbalance in the air-fuel mixture being delivered to the engine, with more air than fuel.
The P1101 code indicates that the Mass Air Flow (MAF) sensor is out of self-test range. The MAF sensor is a crucial component of the vehicle's engine management system, as it measures the amount of air entering the engine to determine the correct air-fuel mixture for combustion.
The P0174 code for Ford vehicles indicates that the fuel injection system on bank 2 is running too lean. This means that there is an imbalance in the air-fuel mixture being delivered to the engine, with not enough fuel being supplied in relation to the amount of air.
Diagnose the issue using a scan tool to confirm the P0108 code and pinpoint the exact cause. Inspect the MAP and BARO sensors for any damage or corrosion, replacing them if necessary. Check for vacuum leaks in the intake system and repair any leaks found.
As the code description implies, the P0420 code means that the vehicle's Engine Control Module (ECM) has detected that the Three-way Catalyst Converter is not working properly (it is not as efficient as the factory expects).