When your Honda’s check engine light is illuminated, it means that your vehicle’s onboard computer has detected an issue in the engine emission system. To diagnose the problem, you need an OBD-II scanner, which generates a specific trouble code to help identify the issue.
In this guide, we will provide you with a comprehensive list of Honda check engine light codes, along with explanations for each code, to help you better understand and resolve any issues that may arise.
1: List of Honda Check Engine Light Codes with Details
Below are the detailed Honda check engine codes. Each code in the list corresponds to a specific issue. These codes help you identify the specific problem.
1: Mass Air Flow Sensor Codes:
1: P0100 – Mass or Volume Air Flow Circuit: The sensor measures the amount of air entering the engine. This code indicates a problem with the sensor or its circuit.
2: P0101 – Mass or Volume Air Flow Circuit Range/Performance Problem: This code suggests that the airflow is out of the expected range, possibly due to a sensor issue.
3: P0102 – Mass or Volume Air Flow Circuit Low Input: It indicates that the airflow sensor is reporting a lower-than-normal input signal.
4: P0103 – Mass or Volume Air Flow Circuit High Input: This code signals that the airflow sensor is reporting a higher-than-normal input signal.
5: P0104 – Mass or Volume Air Flow Circuit Intermittent: This code points to an intermittent issue with the airflow sensor or its circuit.
2: Intake Air Temperature Sensor Codes:
1: P0111 – Intake Air Temperature Sensor 1 Circuit Range/Performance Problem: This code suggests a problem with the intake air temperature sensor circuit, potentially affecting the sensor’s performance.
2: P0112 – Intake Air Temperature Sensor 1 Circuit Low Input: It indicates that the intake air temperature sensor is reporting a lower-than-normal input signal.
3: P0113 – Intake Air Temperature Sensor 1 Circuit High Input: This code signals that the intake air temperature sensor is reporting a higher-than-normal input signal.
3: Engine Coolant Temperature Sensor Codes:
1: P0116 – Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem: This code suggests a problem with the engine coolant temperature sensor circuit, potentially affecting the sensor’s performance.
2: P0117 – Engine Coolant Temperature Sensor 1 Circuit Low Input: It indicates that the engine coolant temperature sensor is reporting a lower-than-normal input signal.
3: P0118 – Engine Coolant Temperature Sensor 1 Circuit High Input: This code signals that the engine coolant temperature sensor is reporting a higher-than-normal input signal.
4: Throttle/Pedal Position Sensor Codes:
1: P0122 – Throttle/Pedal Position Sensor A Circuit Low Input: This code indicates that the throttle or pedal position sensor is reporting a lower-than-normal input signal.
2: P0123 – Throttle/Pedal Position Sensor A Circuit High Input: It suggests that the throttle or pedal position sensor is reporting a higher than normal input signal.
5: Catalytic Converter Codes:
1: P0420 – Catalyst System Efficiency Below Threshold (Bank 1): This code points to a potential issue with the catalytic converter’s efficiency on Bank 1 of the engine.
6: Oxygen Sensor Codes:
1: P0130 – O2 Sensor Circuit (Bank 1, Sensor 1): This code relates to the performance of the upstream oxygen sensor (O2 sensor) in Bank 1.
2: P0131 – O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1): It indicates that the Bank 1, Sensor 1 O2 sensor is reporting a lower than expected voltage.
3: P0132 – O2 Sensor Circuit High Voltage (Bank 1, Sensor 1): This code suggests that the Bank 1, Sensor 1 O2 sensor is reporting higher than expected voltage.
4: P0133 – O2 Sensor Circuit Slow Response (Bank 1, Sensor 1): It signifies that the Bank 1, Sensor 1 O2 sensor is responding slowly.
5: P0135 – O2 Sensor Heater Circuit (Bank 1, Sensor 1): This code relates to the heater circuit of the Bank 1, Sensor 1 O2 sensor.
6: P0137 – O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2): It indicates that the Bank 1, Sensor 2 O2 sensor is reporting a lower than expected voltage.
7: P0138 – O2 Sensor Circuit High Voltage (Bank 1, Sensor 2): This code suggests that the Bank 1, Sensor 2 O2 sensor is reporting higher than expected voltage.
8: P0141 – O2 Sensor Heater Circuit (Bank 1, Sensor 2): This code relates to the heater circuit of the Bank 1, Sensor 2 O2 sensor.
9: P0155 – O2 Sensor Heater Circuit (Bank 2, Sensor 1): It relates to the heater circuit of the Bank 2, Sensor 1 O2 sensor.
7: Fuel System Codes:
1: P0171 – System Too Lean (Bank 1): This code indicates that the air-fuel mixture is too lean in Bank 1 of the engine.
2: P0172 – System Too Rich (Bank 1): It suggests that the air-fuel mixture is too rich in Bank 1 of the engine.
3: P0174 – System Too Lean (Bank 2): This code indicates that the air-fuel mixture is too lean in Bank 2 of the engine.
4: P0175 – System Too Rich (Bank 2): It suggests that the air-fuel mixture is too rich in Bank 2 of the engine.
8: Misfire and Ignition Codes:
1: P0300 – Random/Multiple Cylinder Misfire Detected: This code indicates that the engine is experiencing random or multiple cylinder misfires.
2: P0325 – Knock Sensor 1 Circuit: This points to a problem with the knock sensor circuit.
3: P0326 – Knock Sensor 1 Circuit Range/Performance Problem: This code suggests that there’s an issue with the knock sensor circuit affecting its performance.
4: P0327 – Knock Sensor 1 Circuit Low Input: It indicates that the knock sensor is reporting lower than normal input.
5: P0328 – Knock Sensor 1 Circuit High Input: This code signals that the knock sensor is reporting higher than normal input.
6: P0335 – Crankshaft Position Sensor ‘A’ Circuit: This code relates to the circuit of the crankshaft position sensor.
7: P0336 – Crankshaft Position Sensor ‘A’ Circuit Range/Performance Problem: It suggests a problem with the crankshaft position sensor circuit, affecting its performance.
8: P0337 – Crankshaft Position Sensor ‘A’ Circuit Low Input: It indicates that the crankshaft position sensor is reporting lower than normal input.
9: P0338 – Crankshaft Position Sensor ‘A’ Circuit High Input: This code signals that the crankshaft position sensor is reporting higher than normal input.
10 :P0340 – Camshaft Position Sensor ‘A’ Circuit: This code relates to the circuit of the camshaft position sensor.
11: P0341 – Camshaft Position Sensor ‘A’ Circuit Range/Performance Problem: It suggests a problem with the camshaft position sensor circuit, affecting its performance.
12: P0342 – Camshaft Position Sensor ‘A’ Circuit Low Input: It indicates that the camshaft position sensor is reporting lower than normal input.
13: P0343 – Camshaft Position Sensor ‘A’ Circuit High Input: This code signals that the camshaft position sensor is reporting higher than normal input.
14: P0351 – Ignition Coil ‘A’ Primary/Secondary Circuit: This code relates to the primary and secondary circuits of ignition coil ‘A’.
15: P0352 – Ignition Coil ‘B’ Primary/Secondary Circuit: It relates to the primary and secondary circuits of ignition coil ‘B’.
15: P0353 – Ignition Coil ‘C’ Primary/Secondary Circuit: This code relates to the primary and secondary circuits of ignition coil ‘C’.
16: P0354 – Ignition Coil ‘D’ Primary/Secondary Circuit: It relates to the primary and secondary circuits of ignition coil ‘D’.
8: Evaporative Emission Control System Codes:
1: P0401 – Exhaust Gas Recirculation Flow Insufficient Detected: This code indicates that the exhaust gas recirculation (EGR) flow is insufficient.
2: P0440 – Evaporative Emission Control System Malfunction: This suggests a general malfunction in the evaporative emission control system.
3: P0441 – Evaporative Emission Control System Incorrect Purge Flow: This code indicates that there’s an issue with the purge flow in the evaporative emission control system.
4: P0442 – Evaporative Emission Control System Leak Detected (Small Leak): It suggests the detection of a small leak in the evaporative emission control system.
5: P0446 – Evaporative Emission Control System Vent Control Circuit: This code relates to the vent control circuit of the evaporative emission control system.
6: P0450 – Evaporative Emission Control System Pressure Sensor: This indicates a problem with the pressure sensor in the evaporative emission control system.
7: P0455 – Evaporative Emission Control System Leak Detected (Large Leak): This code indicates the detection of a large leak in the evaporative emission control system.
9: Idle Control and Voltage Codes:
1: P0505 – Idle Control System Malfunction: This code suggests a malfunction in the idle control system.
2: P0506 – Idle Control System RPM Lower Than Expected: It indicates that the engine’s idle RPM is lower than expected.
2: P0507 – Idle Control System RPM Higher Than Expected: This code suggests that the engine’s idle RPM is higher than expected.
3: P0551 – Power Steering Pressure Sensor Circuit Range/Performance Problem: It points to a problem in the power steering pressure sensor circuit affecting its range or performance.
4: P0562 – System Voltage Low: This code indicates that the vehicle’s system voltage is lower than normal.
5: P0563 – System Voltage High: It suggests that the vehicle’s system voltage is higher than normal.
1: How To Read Honda Check Engine Light Codes?
Reading Honda check engine light codes can be done using an OBD-II (Onboard Diagnostics) scanner or code reader. Here’s a step-by-step guide on how to read Honda check engine light codes:
1. Get an OBD-II Scanner:
Purchase an OBD-II scanner if you don’t already have one. These scanners are readily available at auto parts stores, online retailers, or you can borrow one from a friend.
2. Locate the OBD-II Port:
In your Honda vehicle, find the OBD-II port, which is typically located beneath the dashboard near the steering column. It may have a cover that you need to remove.
3. Turn Off the Engine:
Ensure your vehicle’s engine is turned off before connecting the OBD-II scanner.
4. Plug in the Scanner:
Insert the OBD-II scanner’s connector into the OBD-II port. It should fit securely, and you may need to apply some gentle pressure.
5. Turn on the Ignition:
Turn the ignition key to the “On” position without starting the engine. This will provide power to the OBD-II scanner.
6. Navigate the Scanner:
Use the Scanner’s controls or touchscreen interface to navigate through the menu options. You’ll typically find options to read codes, clear codes, and view live data.
7. Read Codes:
Select the “Read Codes” option. The Scanner will communicate with your vehicle’s onboard computer and retrieve any stored trouble codes.
8. Interpret the Codes:
The Scanner will display one or more trouble codes, usually in the format “PXXXX,” where “XXXX” represents a specific code number. Make note of these codes.
9. Look Up the Codes:
Refer to the OBD-II code manual or use the Scanner’s built-in code lookup feature to interpret the meaning of the codes. This will help you understand the specific issue affecting your Honda.
10. Address the Problem:
Based on the code’s meaning, you can decide whether it’s something you can address yourself or if it requires professional assistance. It’s essential to address the issue promptly to prevent further damage to your vehicle.
11. Optional: Clear Codes (if necessary):
If you’ve resolved the issue or if it was a minor, non-recurring problem, you can choose to clear the trouble codes using the Scanner. This will turn off the check engine light. However, it’s advisable to make a note of the codes and keep them for future reference.
12. Disconnect the Scanner:
Once you’ve read the codes and, if necessary, cleared them, you can safely disconnect the OBD-II scanner from the OBD-II port.
Reading Honda check engine light codes with an OBD-II scanner is a straightforward process and allows you to diagnose and address issues with your vehicle’s engine and emission system effectively.
2: Conclusion:
When your Honda’s check engine light comes on, it serves as a warning that the vehicle’s onboard computer has detected an issue within the engine emission system. To pinpoint and diagnose the specific problem, you’ll need an OBD-II scanner, which generates precise trouble codes that help in identifying the issue.
By knowing the meaning of these codes, you can gain insight into the issues affecting your vehicle’s engine, emission system, sensors, and other components.
