All OBD2 Diagnostic Codes
Browse our complete database of 16000 diagnostic trouble codes.
Oxygen Sensor Circuit Malfunction Bank 2 Sensor 1
The upstream oxygen sensor on bank 2 is not functioning properly. This applies to V6/V8 engines.
Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 1
The upstream oxygen sensor on bank 2 is reading consistently low voltage.
Oxygen Sensor Circuit High Voltage Bank 2 Sensor 1
The upstream oxygen sensor on bank 2 is reading consistently high voltage.
Oxygen Sensor Circuit Slow Response Bank 2 Sensor 1
The upstream oxygen sensor on bank 2 is responding too slowly to exhaust changes.
Oxygen Sensor Circuit No Activity Bank 2 Sensor 1
The upstream oxygen sensor on bank 2 shows no switching activity.
Oxygen Sensor Heater Circuit Malfunction Bank 2 Sensor 1
The heater circuit for the upstream oxygen sensor on bank 2 is not working.
P0156: Fuel Trim Malfunction Bank 2 Sensor 2
The fuel trim system has detected a malfunction in the fuel delivery system, specifically with the secondary air/fuel mixture sensor on bank 2.
P0157: Fuel Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
The fuel heated oxygen sensor (FHOS) on bank 2 sensor 2 is not providing a sufficient voltage signal to the engine control module (ECM). This can be caused by a faulty sensor, wiring issue, or a problem with the sensor's heating element.
P0158: Fuel Trim Malfunction (Bank 2 Sensor 2)
The fuel trim system has detected a malfunction in the fuel delivery and air intake system on bank 2, sensor 2. This can cause the engine to run rich or lean, leading to decreased performance and fuel efficiency.
P0159: Fuel Trim Malfunction Bank 2 Sensor 2
The fuel trim system has detected a malfunction in the fuel delivery system, specifically in Bank 2 Sensor 2, which may be causing the engine to run rich or lean.
P0160: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be outside the normal operating range.
P0161: 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.
P0162: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is receiving a low input signal, indicating a problem with the fuel pressure regulator or its circuit.
P0163: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is receiving a low input signal, indicating a problem with the fuel pressure regulator or its circuit.
P0164: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is receiving a low input signal, indicating a problem with the fuel pressure regulator or its associated sensors.
P0165: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is receiving a low input signal, indicating a problem with the fuel pressure regulator or its associated sensors.
P0166: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit is receiving a low input signal, indicating a problem with the fuel pressure regulator or its circuit.
P0167: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit low input indicates that the fuel pressure regulator is not receiving the correct input signal from the engine control module, which can cause issues with fuel delivery and engine performance.
P0168: Fuel Pressure Regulator Circuit Low Input
The fuel pressure regulator circuit low input indicates that the fuel pressure regulator is not receiving the correct input signal from the engine control module (ECM). This can cause the fuel pressure to be too low, leading to poor engine performance and decreased fuel efficiency.
P0169: 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.
P0170: Fuel Trim Malfunction (Bank 1)
The engine control module (ECM) has detected a fuel trim malfunction on bank 1, indicating a lean condition.
System Too Lean Bank 1
The engine is running with too much air and not enough fuel on bank 1. The oxygen sensor is detecting a lean fuel mixture, and the engine control module cannot compensate adequately.
System Too Rich Bank 1
The engine is running with too much fuel and not enough air on bank 1. The oxygen sensor is detecting a rich fuel mixture that the engine control module cannot adequately correct.
P0173: Fuel Trim Malfunction (Bank 1)
The engine computer has detected a fuel trim malfunction on bank 1, indicating a lean condition. This can be caused by a variety of issues, including a vacuum leak, faulty oxygen sensor, or clogged fuel filter.
System Too Lean Bank 2
The engine is running with too much air and not enough fuel on bank 2. Similar to P0171 but affects the second bank of cylinders.
System Too Rich Bank 2
The engine is running with too much fuel and not enough air on bank 2. Similar to P0172 but affects the second bank of cylinders.
P0176: Fuel Trim Malfunction (Bank 1)
The engine computer has detected a fuel trim malfunction on bank 1, indicating a lean condition, which can cause poor engine performance, decreased fuel efficiency, and potentially lead to engine damage.
P0177: Fuel Trim Malfunction (Bank 1)
The engine computer has detected a malfunction in the fuel trim system, which regulates fuel delivery to the engine. This code indicates that the fuel mixture is too lean, meaning there is too much air and not enough fuel.
P0178: Fuel Trim Malfunction (Bank 1)
The engine control module (ECM) has detected a fuel trim malfunction on bank 1, indicating that the fuel mixture is too lean.
P0179: Fuel Trim Malfunction (Bank 1)
The engine computer has detected a fuel trim malfunction on bank 1, indicating a lean condition. This can be caused by a variety of factors, including a vacuum leak, faulty oxygen sensor, or clogged fuel filter.
P0180: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit is malfunctioning, which can cause issues with fuel delivery and air intake system performance.
P0181: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and engine performance.
P0182: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, causing the engine computer to think the fuel is too hot or too cold, which can affect engine performance and fuel efficiency.
P0183: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
P0184: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit is malfunctioning, which can cause issues with fuel delivery and air intake system performance.
P0185: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
P0186: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
P0187: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
P0188: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
P0189: Fuel Temperature Sensor Circuit Malfunction
The fuel temperature sensor circuit has malfunctioned, which can cause issues with fuel delivery and air intake system performance.
P0190: Fuel Pressure Regulator Circuit Malfunction
The fuel pressure regulator circuit is malfunctioning, causing the fuel pressure to be outside the normal operating range.
P0191: Fuel Pressure Regulator Control Circuit Low Input
The fuel pressure regulator control circuit is malfunctioning, causing the fuel pressure to be lower than expected. This can lead to poor engine performance, decreased fuel efficiency, and potentially cause the engine to stall.
P0192: Fuel Pressure Regulator Control Circuit Low Input
The fuel pressure regulator control circuit is malfunctioning, causing the fuel pressure to be too low. This can cause poor engine performance, rough idling, and decreased fuel efficiency.
P0193: 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.
P0194: 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.
P0195: 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.
P0196: Fuel Pressure Regulator Control Circuit Low Input
The fuel pressure regulator control circuit is malfunctioning, causing the fuel pressure to be lower than expected. This can lead to poor engine performance, decreased fuel efficiency, and potentially cause the engine to stall.
P0197: 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.
P0198: Fuel Pressure Regulator Control Circuit Low
The fuel pressure regulator control circuit is malfunctioning, causing the fuel pressure to be lower than expected. This can lead to poor engine performance, decreased fuel efficiency, and potentially cause the engine to stall.
P0199: 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.