All OBD2 Diagnostic Codes
Browse our complete database of 16000 diagnostic trouble codes.
P0100: Mass Airflow Sensor (MAF) Circuit Malfunction
The P0100 code indicates a problem with the mass airflow sensor (MAF) circuit, which measures the amount of air entering the engine. This can cause the engine to run rich or lean, leading to poor performance and decreased fuel efficiency.
Mass Air Flow Sensor Circuit Range/Performance Problem
The mass air flow sensor is not reading within the expected range. This sensor measures the amount of air entering the engine.
Mass Air Flow Sensor Circuit Low Input
The mass air flow sensor is reading lower than expected. This can cause the engine to run rich.
Mass Air Flow Sensor Circuit High Input
The mass air flow sensor is reading higher than expected. This can cause the engine to run lean.
P0104: Mass Airflow Sensor (MAF) Circuit Low Input
The mass airflow sensor (MAF) is not sending a signal to the engine control module (ECM) due to a low airflow reading, which can cause poor engine performance, rough idle, and decreased fuel efficiency.
P0105: Mass Airflow Sensor (MAF) Circuit Low Input
The mass airflow sensor (MAF) is not sending a signal to the engine control module (ECM) indicating airflow into the engine, which can cause poor engine performance, rough idle, and decreased fuel efficiency.
P0106: Mass Airflow Sensor (MAF) Circuit Low Input
The mass airflow sensor (MAF) is not providing a valid signal to the engine control module (ECM), indicating a low airflow reading.
P0107: Mass Airflow Sensor (MAF) Circuit Low Input
The mass airflow sensor (MAF) is not sending a signal to the engine control module (ECM) indicating airflow into the engine. This can cause the engine to run rich or lean, leading to poor fuel economy, decreased performance, and potentially causing damage to the engine.
P0108: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be outside the normal operating range.
P0109: Mass Airflow Sensor (MAF) Circuit Low Input
The mass airflow sensor (MAF) is not providing a valid signal to the engine control module (ECM), indicating a low airflow reading.
P0110: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit is malfunctioning, which can cause issues with fuel delivery and air intake system performance.
P0111: Intake Air Temperature Sensor Circuit Range/Performance Problem
The intake air temperature sensor circuit is malfunctioning, causing the engine computer to think the air temperature is outside the normal range.
P0112: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit is malfunctioning, which can cause issues with fuel delivery and air intake system performance.
Intake Air Temperature Sensor Circuit High Input
The intake air temperature sensor is reading extremely high temperature or has an open circuit.
P0114: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, causing the engine computer to set a code. This can affect fuel delivery and engine performance.
P0115: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
Engine Coolant Temperature Sensor Range/Performance Problem
The engine coolant temperature sensor is not reading within expected parameters for the operating conditions.
Engine Coolant Temperature Sensor Circuit Low Input
The engine coolant temperature sensor is reading extremely high temperature (low resistance = high temp).
Engine Coolant Temperature Sensor Circuit High Input
The engine coolant temperature sensor is reading extremely low temperature (high resistance = low temp).
P0119: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit is malfunctioning, which can affect fuel delivery and air intake system performance.
Throttle Position Sensor Circuit Malfunction
The throttle position sensor is not providing a proper signal to indicate throttle plate position.
Throttle Position Sensor Circuit Range/Performance Problem
The throttle position sensor signal does not correlate with other engine parameters like MAP sensor or engine load.
Throttle Position Sensor Circuit Low Input
The throttle position sensor is reading lower voltage than expected, indicating a closed throttle when it may be open.
Throttle Position Sensor Circuit High Input
The throttle position sensor is reading higher voltage than expected, indicating an open throttle when it may be closed.
P0124: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit has malfunctioned, causing the fuel pressure to be out of the normal range. This can lead to poor engine performance, decreased fuel efficiency, and potentially cause the engine to stall.
P0125: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be out of the normal range.
P0126: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be out of range. This can lead to poor engine performance, decreased fuel efficiency, and potentially cause the engine to stall.
P0127: Fuel Pressure Regulator Control Circuit Low Input
The fuel pressure regulator control circuit is receiving a low input signal, which can cause the fuel pressure to be too low, leading to poor engine performance and decreased fuel efficiency.
Coolant Thermostat Coolant Temperature Below Regulating Temperature
The engine is not reaching proper operating temperature within the expected time frame, usually due to a thermostat stuck open.
P0129: Fuel Pressure Regulator Low Voltage
The fuel pressure regulator is not receiving the correct voltage signal from the powertrain control module, which can cause fuel pressure to be too low, leading to poor engine performance and decreased fuel efficiency.
Oxygen Sensor Circuit Malfunction Bank 1 Sensor 1
The upstream oxygen sensor on bank 1 is not functioning properly. This sensor is critical for fuel mixture control.
Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 1
The upstream oxygen sensor on bank 1 is reading consistently low voltage, indicating a lean condition or sensor failure.
Oxygen Sensor Circuit High Voltage Bank 1 Sensor 1
The upstream oxygen sensor on bank 1 is reading consistently high voltage, indicating a rich condition or sensor failure.
Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1
The upstream oxygen sensor on bank 1 is responding too slowly to changes in exhaust oxygen content.
Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 1
The upstream oxygen sensor on bank 1 shows no activity or switching between rich and lean conditions.
Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1
The heater circuit for the upstream oxygen sensor on bank 1 is not working properly.
Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2
The downstream oxygen sensor on bank 1 (after catalytic converter) is not functioning properly.
Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2
The downstream oxygen sensor on bank 1 is reading consistently low voltage.
Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2
The downstream oxygen sensor on bank 1 is reading consistently high voltage.
Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2
The downstream oxygen sensor on bank 1 is responding too slowly to exhaust changes.
Oxygen Sensor Circuit No Activity Bank 1 Sensor 2
The downstream oxygen sensor on bank 1 shows no switching activity.
Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 2
The heater circuit for the downstream oxygen sensor on bank 1 is not working.
P0142: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be outside the normal operating range.
P0143: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be outside the normal operating range.
P0144: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit has malfunctioned, causing the fuel pressure to be outside the normal operating range.
P0145: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit has malfunctioned, causing the fuel pressure to be outside the normal operating range.
P0146: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is not receiving the correct input signal, which can cause issues with fuel delivery and engine performance.
P0147: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is not receiving the correct input signal, which can cause issues with fuel delivery and engine performance.
P0148: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be out of range. This can lead to poor engine performance, rough idling, and decreased fuel efficiency.
P0149: Fuel Heater Circuit Malfunction
The fuel heater circuit has malfunctioned, preventing the fuel from heating up properly, which can cause issues with fuel delivery and engine performance.