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  • P0300 OBD-II Trouble Code, Random Misfire - Nissan
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Nissan family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Nissan/piart.php?art=365 (2016-05-02)
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  • P0300 OBD-II Engine Code, Random Misfire - Opel
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Opel family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Opel/piart.php?art=365 (2016-05-02)
    Open archived version from archive

  • P0300 OBD-II Fault Code, Random Misfire - Peugeot
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Peugeot family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Peugeot/piart.php?art=365 (2016-05-02)
    Open archived version from archive

  • P0300 OBD-II Trouble Code, Random Misfire - Porsche
    misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Porsche family of autos The codes for any particular vehicle make and model will be

    Original URL path: http://upkeep.us/OBDII/OBD2/Porsche/piart.php?art=365 (2016-05-02)
    Open archived version from archive

  • P0300 OBD-II Check Engine Code, Random Misfire - Saab
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Saab family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Saab/piart.php?art=365 (2016-05-02)
    Open archived version from archive

  • P0300 OBD-II Fault Code, Random Misfire - Subaru
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Subaru family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Subaru/piart.php?art=365 (2016-05-02)
    Open archived version from archive

  • P0300 OBD-II Trouble Code, Random Misfire - Suzuki
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Suzuki family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Suzuki/piart.php?art=365 (2016-05-02)
    Open archived version from archive

  • P0300 OBD-II Engine Code, Random Misfire - Toyota
    detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred but in this case it can t determine the specific cylinder or cyliners that are misfiring Process Synopsis Historically the most basic causes for misfires are lack of spark or an imbalanced fuel air mixture If the misfires seem random or non rhythmic the cause is more likely fuel If it seems like there is a consistent rhythmic occurrence then its more likely caused by lack of spark The same cylinder or cylinders are misfiring This consistent rhythm could also occur if the issue is caused by individual injectors Listen to the engine to see if you can determine if its missing in a pattern or more sporadically missing If its in a pattern you can eliminate many of the broad causes for misfire and focus more on those specific to individual cylinders or vice versa Likely Causes Ignition System Fault Affecting Two or More Cylinders Faulty Ignition coil spark plugs or Ignition wires Ignition Control IC circuit intermittently shorted to ground Erratic or Interrupted Camshaft Position CMP or Crankshaft Position CKP sensor Fuel Metering Affecting Two or More Cylinders Low Fuel less than 1 8 tank or out of fuel Fuel filter plugged dirty causing low fuel pressure Fuel pressure regulator leaking malfunctioning etc causing low or high fuel pressure Fuel pump weak check valve leaking etc causing low fuel pressure Check Fuel Pressure One or more leaking contaminated or sticking fuel injectors Blocks or reduces fuel flow Fuel supply line restricted Check for dents in metal tubing or kinks in rubber tubing Fuel Rail Pressure FRP sensor incorrect reading Fuel supply contaminated Evaporative Emission EVAP system or EVAP canister is full or saturated Air Leaks allow excess air into the Air Intake Positive Crankcase Ventilation PCV system leak valve stuck open etc Exhaust Gas Recirculation EGR valve stuck open or tube gasket or diaphragm leak Blocked Exhaust Gas Recirculation EGR passages Air Measurement Failure Mass Air Flow MAF or Air Flow Sensor AFS sensor contaminated damaged malfunctioning resulting in false air flow readings Faulty Manifold Absolute Pressure Sensor MAP Incorrect voltage from Heated Oxygen Sensors HO2S Base Engine Problem Mechanical problem effecting two or more cylinders broken rings leaking valves bent push rods etc Note On the first trip that the misfires are detected the Malfunction Indicator Lamp MIL will flash on and off On subsequent trips the light will remain illuminated Also Note if this is an Exhaust Gas Recirculation EGR issue one or more Exhaust Gas Recirculation EGR passages may be blocked or partially blocked If this is the case the Misfire Detection Monitor will indicate the Exhaust Gas Recirculation EGR port to check for possible blockage Site Instructions Please note the list of automobile manufacturers at the left edge of the screen The currently selected ODB code is for the Toyota family of autos The codes for any particular vehicle make and model will be found

    Original URL path: http://upkeep.us/OBDII/OBD2/Toyota/piart.php?art=365 (2016-05-02)
    Open archived version from archive