Rick's Free Auto Repair Advice

Posts Tagged: P0128

What causes a P0128 code on GM

How to fix a P0128 code and service engine soon light on GM vehicles Since a P0128 code is defined as Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature, many people automatically replace the thermostat. It’s not an expensive part, but it most likely won’t fix the P0128 code and it will pop up again. GM has issued a service bulletin 09-06-02-004A to address the problem on the vehicles listed below 2009 Buick Enclave 2009 Chevrolet Traverse 2009 GMC Acadia 2009 Saturn OUTLOOK All vehicles equipped with the 3.6L Engine … Read More

P1285, P1299, P0128

P1285, P1299, P0128 Mazda Tribute P1285 (Cylinder Head Over Temperature Condition) P1299 (Cylinder Head Over Temperature Protection Active) P0128 (Coolant Temperature Below Thermostat Regulating Temperature) If you own a Mazda Tribute and have a check engine light with any of these codes; P1285, P1299, P0128, read this post. Mazda has issued a service bulletin No: 01-025/11 to address a corrosion issue that can cause these codes. This bulletin applies to all 2009-10 Mazda Tribute vehicles with the 2.5 L engine. After checking the trouble codes and confirming that the actual … Read More

P0128 Most Common Causes

P0128 most common causes and fix A P0128 trouble code is generic OBDII trouble code and is defined as: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What does a P0128 mean When you start your engine, the ECU looks at the engine coolant temperature sensor and the ambient air temperature sensor (or intake air temperature sensor). Based on the starting temperature of the engine and intake air temp, it calculates the proper amount of fuel and starts the engine. Knowing the engine temperature and engine RPM, the ECU calculates … Read More


Fix code P0128 – Temp Gauge Cold but cooling fans on Shops are noticing a common problem in 2000-05 Chevrolet Impala and Monte Carlo 3.4L, 3.8L engines where the temperature gauge stays on COLD, but the cooling fans are on. In addition, the CHECK ENGINE light is on and code P0128 is in memory. This condition is most often caused by a bad thermostat. So that’s your starting point to fix this problem. Replace the T-stat, clear the code, and restest by driving.   © 2012 Rick Muscoplat

Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN