The 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, it takes too long to warm up.
How do I fix code P0128?
What repairs can fix the P0128 code?
- Replacing the thermostat (most common repair)
- Replacing the coolant temperature sensor, or the wiring and connector associated with the sensor being damaged.
Can I drive my car with a P0128 code?
You may drive your vehicle with a P0128 trouble code. You will not notice any issue except for maybe the temperature gauge never reaching normal levels, and possibly the Check Engine light being illuminated.
How much does it cost to fix P0128?
between $75 and $150
How much will it cost to fix? Running a diagnostic for a P0128 will cost around one hour of labor, which may run you between $75 and $150. If you need to replace the thermostat, the total cost for parts and labor will be around $470 to $505.
How serious is a P0128 code?
Error code P0128 is not serious enough to require immediate repair or prevent you from driving your vehicle. However, as it can greatly impact fuel economy and emissions, the issue should be addressed in a timely manner. Prolonged coolant temperature problems can also lead to serious engine damage.
Can low coolant cause a P0128 code?
Low engine coolant can alter the engine running temperature enough to signal trouble code P0128. Your intake air temperature sensor, coolant temperature sensor and coolant fan could also signal this trouble code, so these should be inspected after you look over your thermostat and coolant level.
What could cause a P0128 code?
Causes of a P0128 code include:
A bad coolant temperature sensor. The cooling fan is stuck on. A bad intake air temperature sensor. A thermostat that’s malfunctioning or stuck open (electronically controlled or traditional)
How do I know if my thermostat is stuck?
Checking For the Signs of a Bad Thermostat
Look to see if the coolant is swirling/flowing immediately — that means the thermostat’s stuck open. If the coolant doesn’t flow after 10 minutes or so and continues to be stagnant after the temperature gauge indicates it’s hot, the thermostat’s likely stuck closed.
What does it mean when coolant temp is below thermostat regulating temp?
The generic P0128 code stands for “Engine Coolant Temperature Below Thermostat Regulating Temperature”. This basically means that the coolant in the engine isn’t reaching the ideal operating temperature and that the engine is essentially running cold.
How much does it cost to replace a coolant thermostat?
But for the average car owner, you can expect to pay between $140 and $300 for a professional mechanic to replace the thermostat in your vehicle for you. The cost of the actual thermostat unit itself is usually between $20 and $80 but can be more for luxury or sports cars.
Where is the coolant temperature sensor located?
In most cars, the primary ECT sensor (ECT sensor 1) is installed near the thermostat in the cylinder head or block or on the thermostat housing. A second coolant temperature sensor could be installed in another part of the engine, or in the radiator.
Will a bad thermostat make the check engine light come on?
the most noticeable issues occur when the thermostat gets stuck in either the open or closed position. a malfunction can result in a trouble code, generated by the engine’s computer, which can turn on your check engine light.