P0128 KIA Code - Coolant Thermostat Malfunction
Quick Answer
Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. Common causes include Leaking or stuck open thermostat, Low engine coolant level, Insufficient warm up time. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0128 KIA indicates Coolant Thermostat Malfunction.
- Common causes
- Common causes include Leaking or stuck open thermostat, Low engine coolant level, Insufficient warm up time.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0128 KIA Description
What are the Possible Causes of the DTC P0128 KIA?
- Leaking or stuck open thermostat
- Low engine coolant level
- Insufficient warm up time
- Faulty engine coolant temperature sensor
- Engine coolant temperature sensor harness is open or shorted
- Engine coolant temperature sensor circuit poor electrical connection
How to Fix the DTC P0128 KIA?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
There is a factory service bulletin for the following Kia models:
2012-2013 Kia Rio
2012-2013 Kia Soul
The Factory Service Bulletin recommends reprogramming the Engine Control Module (ECM) to fix the problem.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0128 KIA code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0128 KIA code?
Need more information on how to fix the P0128 KIA code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0128 KIA code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0128 KIA Code
1. What are the common symptoms of OBDII code P0128 in a KIA vehicle?
- Common symptoms include the engine running hotter or colder than normal, a decrease in fuel efficiency, and the coolant temperature gauge fluctuating erratically.
2. What are some possible causes of the OBDII code P0128 in a KIA car?
- Possible causes include a malfunctioning thermostat, a faulty engine coolant temperature sensor, low coolant levels, or a problem with the cooling system.
3. How serious is a coolant thermostat malfunction indicated by OBDII code P0128 in a KIA?
- Ignoring a coolant thermostat malfunction can lead to engine overheating, potential damage to engine components, and reduced overall vehicle performance.
4. Can I continue driving my KIA with the OBDII code P0128 triggered?
- It is not recommended to continue driving your KIA with the P0128 code triggered, as it can lead to potential engine damage and unsafe driving conditions.
5. How can I diagnose a coolant thermostat malfunction causing the OBDII code P0128 in my KIA?
- Diagnosing the issue involves checking the coolant level, inspecting the thermostat, testing the engine coolant temperature sensor, and examining the cooling system for leaks or blockages.
6. What are some repair tips for fixing the OBDII code P0128 in a KIA due to a coolant thermostat malfunction?
- Repair tips include replacing the thermostat, ensuring proper coolant levels, checking and replacing the engine coolant temperature sensor if necessary, and flushing the cooling system.
7. How much does it typically cost to repair the OBDII code P0128 indicating a coolant thermostat malfunction in a KIA?
- Repair costs can vary depending on the exact cause of the issue, but replacing a faulty thermostat or sensor can range from $150 to $300, while more extensive repairs may cost upwards of $500.
8. Can a DIY enthusiast fix the OBDII code P0128 due to a coolant thermostat malfunction in a KIA?
- DIY enthusiasts with mechanical knowledge and the right tools can often replace a thermostat or sensor themselves, but it's essential to follow proper procedures and safety precautions.
9. How long does it take to repair the OBDII code P0128 related to a coolant thermostat malfunction in a KIA?
- The repair time can vary depending on the exact cause and complexity of the issue, but a straightforward thermostat replacement typically takes around 1-2 hours.
10. Are there any preventive maintenance tips to avoid triggering the OBDII code P0128 in a KIA due to a coolant thermostat malfunction?
- Regularly checking coolant levels, performing cooling system inspections, following the manufacturer's recommended maintenance schedule, and addressing any cooling system issues promptly can help prevent the P0128 code from appearing.
Discuss the causes and fixes for P0128 KIA OBDII Code
-
My 2007 KIA SEDONA EX has a problem with the engine light coming on more frequently than I think it should. In the winter it didn't warm up to operating temp as I was only driving 6 miles one way to my destination. but now it warms up ok but the light still comes on. I have replaced the thermostat twice
and it is ok for a while then the engine light comes on again. It will reset itself after a while if getting up to temperature. Has anyone else experienced this and if so any solutions would help. Email me, JIM @ [email protected] and Thanks to any and all.
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