Check engine error code p0128

Mechanic Cleared Codes I Drove About 1200 Miles Check. P0128 Chevrolet Description An Engine Coolant Temperature sensor monitors the temperature of the coolant. This input is used by the Powertrain Control Module for engine control and as an enabling criteria for some diagnosis. Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > TrailBlazer/ Envoy Tech > 02- 09 Vortec 4. 2L I- 6 Engine and Drivetrain > Engine Tunes/ Mods > P0128 Code, Thermostat or Coolant Temperature Sensor! OBD- II Code P0128 is defined as a Engine temperature has not increased and/ or reached the correct level within a specified amount of time after engine startup P0128 Symptoms Check Engine Light on. P0128 is a OBDII code that indicates that the ideal engine coolant temperature is not being reached either fast enough or at all. Engine coolant temperature has an ideal temperature for engine operation that is normally betweendegrees Celcius orFahrenheit. 95% of the time you will need a thermostat. the engine does not have to be running hot, the temp can be to low or opening slow and not allowing engine to go into closed loop fast enough.

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    The two codes from the check engine light are: P0126 & P0128. Here is what I found according to my research: P0126 is either replace coolant temperature sensor or replace the thermostat. Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. P0128 Information for specific makes P0128 ACURA Coolant System Malfunction. The OBDII trouble code P0128 - Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, takes too long to warm up. Often this code causes the Check Engine light to come on and off in cold temperatures. The code is P0128, Coolant Thermostat, Coolant Temperature Below Thermostat Regulating Temperature. This sounds like it might just be the thermostat, but it is pretty concerning that the light came on the day after I bought. P0128 is a diagnostic trouble code ( DTC) for " Coolant Thermostat ( Coolant Temperature Below Thermostat Regulating Temperature) ". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. A P0128 is a code is an indication of a faulty thermostat or ECT ( engine coolant temp sensor). The manufacture designs the engine to run at a specific operating temperature for the most efficient. engine light codes p0128 and p0410. So far a coolant temperature sensor has been replaced. Question = Before the switch just light on.

    After the switch truck started running rough with the heat. Re: Check Engine Light ( P0128) - Coolant Thermostat My CEL had been coming on recently. I took it to the dealer and they pulled the same code and replaced the thermostat. In some earlier Mazda 3 and Mazda 5 model year vehicles, the code P0128 may be caused by improper calibration of the PCM ( engine computer) according to the Mazda service bulletin. The solution is to reprogram the PCM with an updated software and in some Mazda 3s built prior to also replace the thermostat with an updated part. My check engine light is also on and when checked with the code reader, the 2 codes that came up were P0128 and P04. P0128 Coolant Temperature Is Below Specs. Hello, I pulled a P0128 and after following the proper guidelines I know have to replace a cooling fan and relay on a Chevy Impala. I have a Mazda6 ( iKmiles- manual - 2. 3 litre The engine check light in ON from few days and i went to a nearby autozone and got a scan. The intent of the P0128 code is to indicate a faulty thermostat.

    SOURCE: What can keep causing Check engine code P0128 P0128 Coolant Thermostat ( Coolant Temperature Below Thermostat Regulating Temperature. ) Meaning the regulating temperature is higher than the themostat cooling temperature. you may have to replace the Coolant sensor again. The Check Engine Light came on and a P0128 code was stored ( thermostat rationality). Brought to Dealer and the thermostat was replaced. Next day, Check Engine Light came back on while cruising about 70mph on the highway. Trusted provider of automotive service information including cost estimates and money saving tips. Become educated on automotive repair. SAVE MONEY and buy Motor Oils and Car Parts online - FREE SHIPPING! RECOMMENDED BY THE PEOPLES GARAGE to/ 1ck3B2w What to check when P0128 Code comes on.

    Check engine light came on last Wednesday. Checked YouTube and the internet and everything said replace the thermostat as it probable stuck open. The last code was P0128 so I had the thermostat replaced and put in all new coolant. I haven' t driven my car much but yesterday while on the way to the store, the check engine light went on. When is the code detected? If the Powertrain Control Module ( PCM) detects the calibrated amount of air flow and engine run time have been met, and the Engine Coolant Temperature ( ECT) has not met the minimum thermostat regulating temperature, the code P0128 will set. Basically, the code sets in respect to how long the engine takes to reach operating twemperature, if I am not mistaken, and a poorly regulating thermostat would cause it. I suppose in theory, it could be the coolant temp sensor. P0128 Comments Help us improve AutoCodes. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0128 code? An engine coolant temperature sensor code is not always caused by a defective sensor. It can be triggered by a defective thermostat, defective wiring, rusty coolant, or an overheating engine. So, after all of the above, it' s not impossible that your coolant is just full of goop.

    chevrolet venture: 100 miles. check engine light re. odometer chevrolet venture. recently purchased. on first 200 mile trip, p0128 appeared. I checked coolant level and needed to 3/ 4 gallon of coolant. I cleared code and drove car locally for 2 days. Re: Check engine light, P1028, Coolant Thermostat Do you mean P0128? ^ + 1 That code indicates that the engine was SLOW to reach normal operating temperature, and as noted above that usually means the t- stat is ( at least) partly open when it should be closed. Fixing P0128 On Mazda 3 With 2 0l Or 3l Engine Thermostat The case of ford fusion check engine light code p0128 you check engine light what to common problems repair. Check Engine Light Repair and Diagnostic Help An engine coolant temperature ( ECT) sensor monitors the temperature of the coolant. This input is used by the powertrain control module ( PCM) for engine control and as an enabling criteria for some diagnostics.