PO128. Low temperature. Slow heater. Bad has mileage. Bought new OEM thermostat with seal. Should I get a new gasket? What kind of sealant do I use?
Oct 8, 2019 at 3:30 PM
Advertisement
SCGRANTURISMO
✓Experienced Mechanic
4,897 POSTS
Hello,
This DTC is not a problem with your vehicle's thermostat. If anything it is a problem with your vehicle's Engine Coolant Temperature Sensor [ECT]. In the diagrams down below I have included the vehicle manufacturers diagnostic troubleshooting flowchart for DTC P0128. Please go through this guide and get back to us with what you find out.