Code P0102 Definition Mass or Circuit Airflow (MAF) Circuit Low Voltage Input What Does P0102 Mean? The Mass Airflow (MAF) sensor measures the amount of air entering the engine. When code P0102 is set, there is a low voltage output to the ECM, PCM, or ECU depending on your car type (check your owner’s manual...
Code P0172 Definition Bank 1 has more fuel then it should or not enough air. What Does P0172 Mean? Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. When the upstream oxygen sensor detects there are less than 14.7 parts air to 1 part...
Code P0312 Definition Cylinder 12 misfire detected. Commonly associated with codes: P0300 What Does P0312 Mean? P0312 indicates that cylinder number 12 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is...
Code P0311 Definition Cylinder 11 misfire detected. Commonly associated with codes: P0300 What Does P0311 Mean? P0311 indicates that cylinder number 11 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is...
Code P0310 Definition Cylinder 10 misfire detected. Commonly associated with codes: P0300 What Does P0310 Mean? P0310 indicates that cylinder number 10 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is...
Code P0309 Definition Cylinder 9 misfire detected. Commonly associated with codes: P0300 What Does P0309 Mean? P0309 indicates that cylinder number 9 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is...
Code P0449 Definition Evaporative System (EVAP) Vent Control Circuit Malfunction Code P0449 Meaning The Evaporative Emission Control (EVAP) System seals the fuel system of the vehicle in order to prevent fuel vapors from the fuel tank and fuel system from escaping into the atmosphere. This is important because fuel vapors contain a variety of hydrocarbons....
Code P0401 Definition Exhaust Gas Recirculation (EGR) Flow Insufficient Detected Code P0401 Meaning The exhaust gas recirculation (EGR) recirculates small amounts of exhaust back into the combustion chambers of the engine in order to decrease the combustion temperature, thereby reducing the formation of smog-producing nitrogen oxides. EGR valves can malfunction by becoming stuck open or...
Code P0440 Definition Evaporative Emission Control System Malfunction What Does P0440 Mean? The evaporative emission control (EVAP) system prevents fuel vapors from escaping into the atmosphere. When the vent control valve is open, the fuel vapors from the fuel tank travel through a vent line to the charcoal canister. The fuel vapors are then absorbed...
Code P0441 Definition Evaporative Emission Control System Incorrect Purge Flow Code P0441 Meaning The evaporative emission control (EVAP) system prevents fuel vapors from escaping into the atmosphere. When the vent control valve opens, the fuel vapors from the fuel tank travel through a vent line to the charcoal canister. The fuel vapors are then absorbed...
