How to Read and Clear Fault Codes on Kia

Your KIA may start showing warning lights such as ABS, SRS, transmission temperature, oil pressure, battery charging, differential, Tract control, check engine light, etc. These lights mean something: they are saved in your vehicle’s On-Board Diagnostic, where an OBD-II Scanner is used to interpret and ready the codes. Understanding and addressing these codes is crucial for maintaining your KIA’s top form and ensuring a smooth ride down the road or the mountain.

How to read and clear Kia codes

OBD stands for “On-Board Diagnostic”. Most modern vehicles now include an OBD port, which can be utilized by a scanner that communicates to your vehicle. It is plugged in by an OBD-II scanner into the socket designed to help automotive technicians interpret faults and other issues that your KIA may be experiencing or have recorded. All KIAs have an OBD-II port; some common models include Sorento, Carnival, Stonic, Soluto, Seltos, and many more. Click here to learn about your KIA’s dashboard lights here. Moving on, here are the steps on how to read DTCs or Fault codes:

1. Gather the necessary tools: Equip yourself with a Professional-Grade OBD-II Scanner compatible with your KIA.
2. Access the OBD-II Port: This port is usually found under the dashboard, near the steering column; the OBD-II port is the gateway to your car’s diagnostic information. Turn the ignition key to the “ON” position without starting the engine to make a connection with the vehicle’s computer. If your KIA has a START/STOP feature, press the button without pressing the brake pedal. Do not start the engine. If you are unsure of the OBD-II port of your vehicle, you can always check the Car Owner’s Manual.
3. Turn on the ignition. Do not start the engine.
4. Access the Diagnostic Menu: On the YOUCANIC scanner’s display, navigate to the “Diagnostic” or “Scan” menu. This menu allows you to access various diagnostic functions for your KIA.
5. Select ‘KIA’ as the Vehicle Make: This ensures the scanner effectively communicates with the KIA’s On-Board Diagnostic system and effectively scans the fault codes.
6. Select option for model selection: The scanner has various options for model selection. You can choose SmartVIN to detect your vehicle automatically. However, you choose Manual Selection if SmartVIN does not work as intended.
7. Select the Specific Model and Chassis: After selecting the vehicle make, scroll through the available models and select the correct one for your KIA. Choose the corresponding chassis or body type to properly sync the scanner to your vehicle.
8. Select Control Units: Once you have selected the model and chassis, the scanner will let you choose between “Quick scan” or “Control Modules”. Control Modules display a list of control units or modules in your vehicle. Examples include the engine control module (ECM), transmission control module (TCM), and ABS control module. Choose the specific module you want to diagnose. Otherwise, you can also choose the  “Quick Scan” to check everything.
9. Interpret the Codes: Once the YOUCANIC scanner completes the code retrieval process, the displayed codes will provide information about specific issues detected by the control unit. Take note of these codes for further analysis and diagnosis. Each DTC consists of a letter and four numbers. The letter indicates the system affected, while the numbers describe the issue more specifically. Click here to learn more about fault codes.
10. Erase Codes: After the problem has been repaired, return to the scanner’s menu and select the option to “Erase Codes” or “Clear Codes.” This action removes the stored fault codes from the control unit’s memory, indicating that the problem has been resolved. Please note that you may or may not erase a code when the issue is not fixed.

NOTE: These pictures are just the demo of our YOUCANIC Scanner, it may or may not be the same

Common Kia Fault Codes

Here’s a list of 20 common Kia fault codes, along with their definitions and potential causes:

• P0300 – Random/Multiple Cylinder Misfire Detected: This indicates that multiple cylinders are misfiring, possibly due to faulty spark plugs, ignition coils, or a clogged fuel system.
• P0171 – System Too Lean (Bank 1): This suggests the air-fuel mixture is too lean on Bank 1, potentially caused by vacuum leaks, fuel injector issues, or a defective oxygen sensor.
• P0420 – Catalyst System Efficiency Below Threshold (Bank 1): Indicates a less efficient catalytic converter, possibly due to its deterioration or a faulty oxygen sensor.
• P0455 – Evaporative Emission Control System Leak Detected (Gross Leak): Suggests a significant leak in the EVAP system, possibly due to loose fuel cap, damaged hoses, or faulty EVAP canister.
• P0340 – Camshaft Position Sensor ‘A’ Circuit (Bank 1 or Single Sensor): Indicates a malfunction in the camshaft position sensor circuit, potentially caused by a faulty sensor or wiring issues.
• P0301 – Cylinder 1 Misfire Detected: Specific to a misfire in cylinder 1, often due to problems with spark plugs, ignition coils, or fuel delivery.
• P2187 – System Too Lean at Idle (Bank 1): This code suggests that the air-fuel mixture is too lean during idle on Bank 1, possibly due to vacuum leaks or a malfunctioning mass air flow sensor.
• P0441 – Evaporative Emission Control System Incorrect Purge Flow: Indicates an issue with the EVAP system purge flow, potentially caused by faulty purge valves or blockages in the system.
• P0011 – ‘A’ Camshaft Position – Timing Over-Advanced or System Performance (Bank 1): Indicates the camshaft timing is too advanced, possibly due to oil flow issues or a faulty camshaft position actuator.
• P0101 – Mass or Volume Air Flow ‘A’ Circuit Range/Performance: Suggests a problem with the mass air flow sensor or circuit, possibly due to a dirty or faulty sensor.
• P0113 – Intake Air Temperature Sensor 1 Circuit High: Indicates a high input from the intake air temperature signal, possibly due to a faulty sensor or wiring problems.
• P0128 – Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature): Suggests a malfunctioning thermostat or a low coolant level.
• P0138 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 2): Indicates the oxygen sensor is producing a higher voltage than normal, potentially due to a faulty sensor or exhaust leak.
• P0150 – O2 Sensor Circuit (Bank 2 Sensor 1): Suggests a malfunction in the oxygen sensor circuit on bank 2, sensor 1, potentially due to a faulty sensor or wiring issue.
• P0201 – Injector Circuit/Open – Cylinder 1: Indicates an open circuit in the fuel injector of cylinder 1, possibly due to a faulty injector or wiring problem.
• P0304 – Cylinder 4 Misfire Detected: Specific to a misfire in cylinder 4, often due to issues with spark plugs, ignition coils, or fuel delivery.
• P0335 – Crankshaft Position Sensor ‘A’ Circuit Malfunction: This indicates an issue with the crankshaft position sensor circuit, potentially caused by a faulty sensor or wiring issues.
• P0456 – Evaporative Emission System Leak Detected (Very Small Leak): Suggest a minor leak in the EVAP system, potentially due to a loose fuel cap or small hose cracks.
• P0500 – Vehicle Speed Sensor ‘A’ Malfunction: Indicates a problem with the vehicle speed sensor, potentially due to faulty sensor or wiring issues.
• P0562 – System Voltage Low: Suggests the vehicle’s electrical system voltage is low, possibly due to a failing alternator or poor battery condition.

Remember, these are common fault codes and their usual causes, but a thorough diagnostic check is always recommended to pinpoint the exact issue.

DIY vs Authorized Mechanic: Making the Right Call

Whether to tackle DTCs yourself or seek professional assistance depends on your mechanical aptitude and the issue’s complexity. If you’re a seasoned DIY enthusiast with a well-stocked toolbox, you might be able to handle minor to complex issues. It’s essential to recognize the limitations of self-diagnosis. However, for more intricate problems, it’s wise to entrust your KIA to the expertise of authorized KIA technicians. Check our article here if the check engine light stays on in your KIA.

Decoding the Enigma of DTCs

DTCs are standardized codes that follow a specific format, providing valuable insights into the nature of the problem. The first character indicates the type of system (P for powertrain, B for body, C for chassis, and U for network comm.), followed by four digits. The first digit identifies the system, the second digit denotes the subsystem, and the last two digits pinpoint the specific fault.

For instance, a DTC starting with P01 would indicate a powertrain issue related to fuel or air metering. Further, a code like P0171 would point to a lean air-fuel mixture.

Why Should I Scan My Vehicle?

Regular scanning offers several benefits:

• Early Detection of Issues: DTCs can alert you to potential problems before they cause noticeable symptoms, allowing for timely intervention.
• Improved Fuel Efficiency: Addressing underlying issues can enhance fuel economy, saving you money at the pump.
• Extends the Vehicle Lifespan: Promptly addressing faults can prevent further damage and prolong your Kia’s lifespan.

Regular scanning as a preventive checkup for your KIA is like visiting your doctor annually. Your KIA deserves regular attention to keep it running smoothly and safely.

Check our article here to know the best OBD-II for DIY Enthusiasts: Best OBD2 Scanner For DIY Auto Repair – YOUCANIC.

Why can’t I clear the error codes of my KIA?

Once you’ve identified the DTCs, you may be tempted to clear them, hoping to continue driving your KIA, and the problem magically disappears. While clearing the codes can temporarily remove the “Check Engine” light, it doesn’t address the underlying issue. It will always come back. Here are also some lists of why you cannot clear the codes of your KIA:

• Use a Professional-Grade Scanner: Ditch the generic scanner and upgrade to a professional-grade like YOUCANIC. Generic scanners are like trying to open a Ferrari with a Ford key – it won’t work! YOUCANIC, on the other hand, is like the master key to your Kia’s diagnostics, unlocking hidden diagnostic powers and letting you clear codes that would otherwise remain stubborn and hidden.
• Underlying Issues: Before clearing fault codes, remember to address the underlying issue that triggered them in the first place. Clearing codes is like patching a leaky pipe without fixing the cracked valve – it’s just a temporary fix. The ‘check engine’ light will surely come back and haunt you.
• Continuous Fault Monitoring: Like the SRS system, certain fault codes may be cleared by disconnecting the battery (like a reset). They will reappear even after clearing until the root cause is resolved. It is a persistent reminder to fix the problem, not just mask it.
• Proper Clearing Procedure: Following the correct steps outlined in your diagnostic scanner’s user manual is essential to clear fault codes effectively. If unsure about the clearing procedure, consult a professional for guidance specific to your scanner and KIA model.

Check our YOUCANIC Scanner:

YOUCANIC Full System Car Diagnostic Scanner

What Happens When I Ignore Fault Codes?

Ignoring DTCs can lead to a cascade of issues.

1. Performance: Over time, unaddressed faults can lead to decreased performance, reduced fuel efficiency, and increased emissions.
2. Safety Hazard: Ignored DTCs can pose safety risks, particularly related to critical systems like brakes or airbags.
3. Costly Repairs: Putting off repairs can result in more extensive damage, such as damage to your transmission, leading to higher repair costs in the long run.

Frequently Asked Questions:

References:

1. What Is an OBD2 Scanner and How Does It Work?
   What Is an OBD2 Scanner and How Does It Work? | The Drive
2. DTC Fault Codes
   DTC Fault Codes – YOUCANIC
3. What Does the Check Engine Light Look Like, and What Does It Mean?
   What Does the Check Engine Light Look Like, and Really Mean? – Consumer Reports
4. A Guide to Understanding DTC Codes
   A Guide to Understanding DTC Codes (samsara.com)

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