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What does the P0300 Random or Multiple Cylinder Misfire Detected mean? P0300 code gets triggered when the Engine Control Module detects an engine misfire that’s either random or showing up on multiple cylinders. Misfire means that the combustion process inside one or more cylinders isn’t happening properly. You may also find another OBD-II code, like…

What does the P0430 Catalyst Efficiency Below Threshold (Bank 2) mean? P0430 code gets triggered when the Engine Control Module detects a condition that indicates that the catalytic converter is operating below the minimum allowable efficiency threshold. The purpose of a catalytic converter is to use a chamber called a catalyst to change the harmful…

What does the P0420 Catalyst Efficiency Below Threshold (Bank 1) mean? P0420 code gets triggered when the Engine Control Module detects a condition that indicates that the catalytic converter is operating below the minimum allowable efficiency threshold. The purpose of a catalytic converter is to use a chamber called a catalyst to change the harmful…

What does the P0175 System too Rich (Bank 2) mean? P0175 code gets triggered when the Engine Control Module receives an input signal from the oxygen sensor—also called the air-fuel ratio sensor—indicating that the air/fuel mixture has been running too rich for an extended period of time. Now, let’s talk specifics. A rich mixture means…

What does the P0160 Oxygen Sensor Circuit No Activity Detected (Bank 2, Sensor 2) mean? P0160 code gets triggered when the Engine Control Module has detected inactivity from the oxygen sensor, also known as the air-fuel ratio sensor. This inactivity typically indicates that the oxygen sensor isn’t sending voltage signals back to the ECM, often…

What does the P0159 Oxygen Sensor Circuit Slow Response (Bank 2, Sensor 2) mean? P0159 code gets triggered when the Engine Control Module detects that the voltage from the oxygen sensor—also known as the air-fuel ratio sensor—is slower than expected. Specifically, we’re talking about the oxygen sensor for Bank 2, Sensor 2. When the P0159…

What does the P0171 System too Lean (Bank 1) mean? P0172 code gets triggered when the Engine Control Module receives an input signal from the oxygen sensor—also called the air-fuel ratio sensor—indicating that the air/fuel mixture has been running too lean for an extended period of time. Now, let’s talk specifics. A lean mixture means…

What does the P0172 System too Rich (Bank 1) mean? P0172 code gets triggered when the Engine Control Module receives an input signal from the oxygen sensor—also called the air-fuel ratio sensor—indicating that the air/fuel mixture has been running too rich for an extended period of time. Now, let’s talk specifics. A rich mixture means…

What does the P0174 System too Lean (Bank 2) mean? P0174 code gets triggered when the Engine Control Module receives an input signal from the oxygen sensor—also called the air-fuel ratio sensor—indicating that the air/fuel mixture has been running too lean for an extended period of time. Now, let’s talk specifics. A lean mixture means…

What does the P0158 Oxygen Sensor Circuit High Voltage (Bank 2, Sensor 2) mean? P0158 code gets triggered when the Engine Control Module detects that the voltage from the oxygen sensor—also known as the air-fuel ratio sensor—has remained too high for too long. This high voltage usually indicates that the sensor is detecting a rich…