When the check engine light in your reliable Hyundai vehicle is triggered, it indicates that a problem has been detected by the onboard computer. To identify the problem, you can rely on the Onboard Diagnostics II (OBD-II) system, which generates specific trouble codes to assist in identifying and diagnosing the problem.
In this guide, we’ll provide you with a comprehensive list of Hyundai check engine light codes, along with explanations for each code, to help you better understand and address any issues that may arise.
1: List of Hyundai Check Engine Light Codes with Details:
Below is a detailed list of Hyundai check engine light codes. Each code in the list corresponds to a specific issue or malfunction. This makes it easier to diagnose and address the problem when you identify the specific code.
1.1: Mass Air Flow Sensor Codes:
P0101 – Mass Air Flow Sensor “A” Circuit Range/Performance: This code indicates that there is an issue with the range or performance of the Mass Air Flow (MAF) sensor in the “A” circuit. The MAF sensor measures the amount of air entering the engine.
P0102 – Mass Air Flow Sensor “A” Circuit Low: This code suggests that the MAF sensor in the “A” circuit is reporting a lower-than-expected input signal. This could be due to a problem with the sensor or its circuit.
P0103 – Mass Air Flow Sensor “A” Circuit High: This code indicates that the MAF sensor in the “A” circuit is reporting a higher-than-expected input signal. This may be caused by a problem with the sensor or its circuit.
1.2: Manifold Absolute Pressure Sensor Codes:
P0106 – Manifold Absolute Pressure Sensor Range/Performance: This code indicates that there is a problem with the range or performance of the Manifold Absolute Pressure (MAP) sensor. The MAP sensor measures the pressure of the air entering the engine.
P0107 – Manifold Absolute Pressure Sensor Low: This code indicates that the MAP sensor is reporting a lower-than-normal input signal. This may be due to a problem with the sensor or its wiring.
P0108 – Manifold Absolute Pressure Sensor High: This code signals that the MAP sensor is reporting a higher-than-normal input signal. This can also result from a problem with the sensor or its circuit.
1.3: Intake Air Temperature Sensor Codes:
P0112 – Intake Air Temperature Sensor “A” Circuit Low: This code indicates that the engine’s computer (ECU or PCM) has detected a lower-than-expected voltage signal from the IAT sensor.
P0113 – Intake Air Temperature Sensor “A” Circuit High: This code, on the other hand, indicates that the engine’s computer has detected a higher-than-expected voltage signal from the IAT sensor.
1.4: Engine Coolant Temperature Sensor Codes:
P0116 – Engine Coolant Temperature Sensor Range/Performance: This code indicates that the engine’s computer (ECU or PCM) has detected an issue with the range or performance of the Engine Coolant Temperature (ECT) sensor.
P0117 – Low Input Signal in the Engine Coolant Temperature Sensor Circuit: This code means that the engine’s computer has detected a lower-than-expected voltage signal from the engine coolant temperature (ECT) sensor.
P0118 – High Input Signal in the Engine Coolant Temperature Sensor Circuit: This code means that the engine’s computer has detected a higher-than-expected voltage signal from the engine coolant temperature (ECT) sensor.
1.5: Throttle/Pedal Position Sensor Codes:
P0121 – Throttle/Pedal Position Sensor/Switch ‘A’ Circuit Performance Issue: This code indicates a problem with the performance of the circuit related to the throttle or pedal position sensor/switch ‘A.’
P0122 – Low Signal Detected in Throttle/Pedal Position Sensor/Switch ‘A’ Circuit: This code means that the engine’s computer has detected a lower-than-expected voltage signal from the throttle or pedal position sensor/switch ‘A.’
P0123 – High Signal Detected in Throttle/Pedal Position Sensor/Switch ‘A’ Circuit: This code means that the engine’s computer has detected a higher-than-expected voltage signal from the throttle or pedal position sensor/switch ‘A.’
1.6: Oxygen Sensor Codes (Bank 1):
P0130 – Oxygen Sensor Circuit Issue, Bank 1, Position 1: This code indicates a problem in the oxygen sensor circuit for the sensor located in bank 1, position 1.
P0131 – Low Voltage in Oxygen Sensor Circuit, Bank 1, Position 1: This code means that the engine’s computer has detected lower-than-expected voltage in the oxygen sensor circuit for the sensor in bank 1, position 1.
P0132 – High Voltage in Oxygen Sensor Circuit, Bank 1, Position 1: This code indicates that the engine’s computer has detected higher-than-expected voltage in the oxygen sensor circuit for the sensor in bank 1, position 1.
P0133 – Slow Response in Oxygen Sensor Circuit, Bank 1, Position 1: This code points to a slow response issue in the oxygen sensor circuit for the sensor in bank 1, position 1.
P0134 – No Activity Detected in Oxygen Sensor Circuit, Bank 1, Position 1: This code indicates the absence of detectable activity in the oxygen sensor circuit for the sensor in bank 1, position 1.
P0135 – Oxygen Sensor Circuit Bank 1 Sensor 2: This code indicates an issue with the oxygen sensor circuit for the downstream sensor in bank 1.
P0136 – Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2: This code means that the engine’s computer has detected lower-than-expected voltage in the oxygen sensor circuit for the downstream sensor in bank 1.
P0137 – Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2: This code indicates that the engine’s computer has detected higher-than-expected voltage in the oxygen sensor circuit for the downstream sensor in bank 1.
P0138 – Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2: This code points to a slow response issue in the oxygen sensor circuit for the downstream sensor in bank 1.
P0139 – Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 2: This code indicates the absence of detectable activity in the oxygen sensor circuit for the downstream sensor in bank 1.
P0140 – Oxygen Sensor Circuit Bank 1 Sensor 3: This code indicates an issue with the oxygen sensor circuit for an additional sensor, typically located downstream.
P0141 – Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 3: This code means that the engine’s computer has detected lower-than-expected voltage in the oxygen sensor circuit for the additional sensor in bank 1.
P0142 – Oxygen Sensor Circuit High Voltage Bank 1 Sensor 3: This code indicates that the engine’s computer has detected higher-than-expected voltage in the oxygen sensor circuit for the additional sensor in bank 1.
P0143 – Oxygen Sensor Circuit Slow Response Bank 1 Sensor 3: This code points to a slow response issue in the oxygen sensor circuit for the additional sensor in bank 1.
P0144 – Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 3: This code indicates the absence of detectable activity in the oxygen sensor circuit for the additional sensor in bank 1. It implies that the sensor is not providing any data, possibly due to a malfunction or wiring problem.
1.7: Oxygen Sensor Codes (Bank 2):
P0150 – Oxygen Sensor Circuit Issue, Bank 2, Position 1: This code indicates a problem with the oxygen sensor circuit for the sensor in Bank 2, Position 1. It suggests a general issue with this specific oxygen sensor’s circuit.
P0151 – Low Voltage Detected in Oxygen Sensor Circuit, Bank 2, Position 1: This code means that the engine’s computer has detected lower-than-expected voltage in the oxygen sensor circuit for the sensor in Bank 2, Position 1.
P0152 – High Voltage Detected in Oxygen Sensor Circuit, Bank 2, Position 1: This code indicates that the engine’s computer has detected higher-than-expected voltage in the oxygen sensor circuit for the sensor in Bank 2, Position 1.
P0153 – Slow Response in Oxygen Sensor Circuit, Bank 2, Position 1: This code points to a slow response issue in the oxygen sensor circuit for the sensor in Bank 2, Position 1. It suggests that the sensor is not reacting quickly enough to changes in exhaust gas conditions.
P0154 – No Activity Detected in Oxygen Sensor Circuit, Bank 2, Position 1: This code indicates the absence of detectable activity in the oxygen sensor circuit for the sensor in Bank 2, Position 1. It implies that the sensor is not providing any data, possibly due to a malfunction or wiring problem.
P0155 – Oxygen Sensor Circuit Bank 2 Sensor 2: This code indicates an issue with the oxygen sensor circuit for the downstream sensor in Bank 2. It suggests a general issue with the downstream oxygen sensor’s circuit in Bank 2.
P0156 – Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 2: This code means that the engine’s computer has detected lower-than-expected voltage in the oxygen sensor circuit for the downstream sensor in Bank 2.
P0157 – Oxygen Sensor Circuit High Voltage Bank 2 Sensor 2: This code indicates that the engine’s computer has detected higher-than-expected voltage in the oxygen sensor circuit for the downstream sensor in Bank 2.
P0158 – Oxygen Sensor Circuit Slow Response Bank 2 Sensor 2: This code points to a slow response issue in the oxygen sensor circuit for the downstream sensor in Bank 2. It suggests that the sensor is not reacting quickly enough to changes in exhaust gas conditions.
P0159 – Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 2: This code indicates the absence of detectable activity in the oxygen sensor circuit for the downstream sensor in Bank 2.
P0160 – Oxygen Sensor Circuit Bank 2 Sensor 3: This code indicates an issue with the oxygen sensor circuit for an additional sensor, typically located downstream in Bank 2. It suggests a general issue with this specific sensor’s circuit.
P0161 – Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 3: This code means that the engine’s computer has detected lower-than-expected voltage in the oxygen sensor circuit for the additional sensor in Bank 2.
P0162 – Oxygen Sensor Circuit High Voltage Bank2 Sensor 3: This code indicates that the engine’s computer has detected higher-than-expected voltage in the oxygen sensor circuit for the additional sensor in Bank 2.
P0163 – Oxygen Sensor Circuit Slow Response Bank 2 Sensor 3: This code points to a slow response issue in the oxygen sensor circuit for the additional sensor in Bank 2.
P0164 – Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 3: This code indicates the absence of detectable activity in the oxygen sensor circuit for the additional sensor in Bank 2. It implies that the sensor is not providing any data, possibly due to a malfunction or wiring problem.
1.8: Fuel Trim and Fuel System Codes:
P0170 – Fuel Trim Bank 1: This code indicates an issue with the fuel trim on Bank 1 of the engine. It suggests that the engine control module (ECM) is making adjustments to the fuel mixture in an attempt to correct a problem.
P0171 – System Too Lean Bank 1: This code means that the air-fuel mixture in Bank 1 is too lean, meaning there is too much air and not enough fuel.
P0172 – System Too Rich Bank 1: This code indicates that the air-fuel mixture in Bank 1 is too rich, meaning there is too much fuel and not enough air.
P0173 – Fuel Trim Bank 2: Similar to P0170, this code indicates an issue with the fuel trim, but in Bank 2 of the engine.
P0174 – System Too Lean Bank 2: Similar to P0171, this code means that the air-fuel mixture in Bank 2 is too lean, suggesting a potential problem with fuel delivery.
P0175 – System Too Rich Bank 2: Similar to P0172, this code indicates that the air-fuel mixture in Bank 2 is too rich, suggesting a potential problem with fuel delivery.
1.9: Fuel Temperature Sensor Codes:
P0181 – Fuel Temperature Sensor Circuit Issue: This code signals a problem in the circuit for fuel temperature sensor ‘A.’ It suggests a range or performance issue with this sensor, which measures fuel temperature in the vehicle.
Related: Hyundai Check Engine Light on
2: Conclusions:
In summary, the check engine light is an essential sign of potential problems in your Hyundai car. If you understand the check engine light codes, you can troubleshoot your Hyundai quickly. So, It is vital to maintain the vehicle’s reliability and performance.
If you follow the manufacturer’s recommended procedures, you can ensure your Hyundai car consistently operates in a smooth and efficient manner.
3: FAQ About Hyundai Check Engine Light Codes
If you want to gather more information about the Hyundai check engine light, let’s proceed with a question-and-answer session for more information.
Q: How can I check my check engine light code without a scanner?
A: You cannot access specific check engine codes without a scanner. However, you can obtain basic diagnostic information by counting the number of times your check engine light blinks (if applicable) or by using a code reader tool. The code reader is a more budget-friendly alternative to a full scanner, and it can provide some insights into the issue.
Q: How do I find my check engine code?
A: If you want to find a check engine code, you should have a diagnostic scanner or a code reader tool. You connect them to the vehicle’s OBD-II port located under the dashboard, and they retrieve the code that corresponds to the check engine light trigger.
Q: Which digit is the engine code?
A: The engine code is typically indicated by the first digit in the alphanumeric code. For example, in the code P0455, “P” represents the powertrain (engine), and “0455” is the specific code.
Q: How long are check engine codes stored?
A: Check engine codes are stored in your vehicle’s computer (ECU) until they are manually cleared with a scanner or code reader. They can persist for a long time, allowing mechanics to review historical data to diagnose recurring issues.
Q: How many engine codes are there?
A: There are hundreds of potential engine trouble codes, each corresponding to a specific issue or system in your vehicle. The exact number may vary depending on the vehicle’s make, model, and year.
Q: What is the code for a bad O2 sensor?
A: A common trouble code for a faulty oxygen (O2) sensor is “P0135” for the upstream (pre-catalytic converter) sensor on Bank 1. There are several other O2 sensor-related codes as well, depending on the specific problem.
Q: What are the different types of engine codes?
A: Engine codes, or OBD-II trouble codes, are categorized into several groups, including:
- P-codes: Powertrain codes, related to the engine and transmission.
- C-codes: Chassis codes, associated with the vehicle’s suspension and brakes.
- B-codes: Body codes, concerning the vehicle’s interior and exterior systems.
- U-codes: Network communication codes, for issues with the vehicle’s computer systems.
- Manufacturer-specific codes: Unique codes used by certain vehicle manufacturers for specific problem
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