What Is p01f0 code duramax (with easy fix guide)

Duramax engines have a built-in coolant temperature sensor. And it will begin to produce p01f0 code Duramax when the engine coolant temperature falls below the standard temperature.

If your Duramax engine has a P01F0 code, it means the engine coolant temperature is below the average diagnostic monitoring heat.

Moreover, this can indicate several problems with the engine, such as a blown head gasket or cracked block. When you get this code, it’s important to bring your truck in for service as soon as possible.

p01f0 code duramax

What does the p01f0 code mean on Duramax?

If you notice about your coolant temperature is dropping below normal, it’s important to investigate the issue.

A P01F0 code may be a sign of a bigger problem and could require the installation of a new thermostat or other cooling system components.

In some cases, however, a low coolant temperature may simply be the result of a clogged radiator.

Your engine may be telling you about your coolant temperature is low, but there may be a bigger problem.

If the coolant isn’t staying at the correct temperature, it can create all sorts of problems, from overheating to engine failure.

How Serious Is The P01f0 Code?

If you’re noticing your engine is running a little rougher than usual, and your coolant temperature is dropping, it might be time to check your coolant level.

The P01f0 code (coolant temp low) is one of the most common errors on Duramax. And it means something in your cooling system is not working right.

Moreover, this can be indicative of a more serious problem, such as a blown head gasket, and you will need to take your car in for repair.

If left untreated, this issue can cause permanent damage to your truck’s engine.

What are the symptoms of the p01f0 code on Duramax?

There are a few symptoms that Duramax owners may experience if they have a P0120 code.

These symptoms can include

  • A low coolant temperature,
  • Problems with the engine performance
  • Problems with the thermostat.
  • In some cases, the code may indicate there is a problem with the engine’s water pump.

If you’re experiencing any of these signs and symptoms, it’s important to have your vehicle inspected as soon as possible to determine the cause and fix any issues.

The Causing Factors of the p01f0 code Duramax

P01f0 code Duramax is a problem that can result from a variety of problems. In some cases, the p01f0 code may be caused by

  • A vacuum leak.
  • An air leak,
  • A misfire,
  • A failed catalytic converter.

These are not serious issues. But there could be some serious issues when the following problems arise.

The p01f0 code is a warning which indicates a problem with the engine coolant too. Some other common and serious cause of this code is

  • Low coolant temperature,
  • Faulty sensors,
  • A stuck thermostat,
  • And the air in the coolant.

If you experience a p01f0 code, it’s important to take the time to investigate the source of the problem and fix it as soon as possible.

How do I fix my p01f0 duramax code?

Adding more coolant to your car may fix the p01f0 code on Duramax. If your vehicle’s cooling system is not working properly, adding more coolant may help to fix the code.

In some cases, adding too much coolant can damage your engine.

If you’re having trouble with your Duramax engine, be sure to speak with a mechanic to see if adding more coolant will help.

If your Duramax is experiencing a “P01F0” code, it may be time to replace the thermostat.

Moreover, this issue is often caused by debris or corrosion blocking the heating element inside the thermostat.

By replacing the thermostat, you can hopefully fix the issue and get your Duramax back on the road.

How Much Does It Cost To Solve p01f0 code 2015 duramax?

If you’re experiencing p01f0 code on your Duramax, it’s time to take the necessary steps to have it fixed.

Depending on the severity of the problem, a repair shop may charge anywhere from $100 up to $500.

However, there are several ways to fix this issue for relatively cheap.

Yet, according to the Duramax Owners Club, a p01f0 code can indicate many different problems with your engine. And due to this difference, the cost of fixing them can vary greatly.

Common mistakes when diagnosing the p01f0 code

When diagnosing a p01f0 code on a Duramax engine, some common mistakes should be avoided.

  • First, it is important to correctly identify the fault.
  • Secondly, the code must be diagnosed using the correct testing methods.
  • Thirdly, it is important to have accurate data logging and analysis tools at hand.
  • Fourthly, when investigating the cause of the fault, it is important to avoid making unnecessary repairs.

frequently asked questions (FAQs)

1. What is the normal operating temperature of a Duramax?

Anything below 235 degrees Fahrenheit is considered the normal operating temperature for these engines. Even if you don’t tow, your transmission can handle anything under 220. If the factory DEX VI is present, a solid 235 to 240 is a realistic bet.

2. How do you clear codes on a Duramax?

To turn on the ignition, insert your key around three times once the battery has been detached. By completing this step, you will turn off the light and erase all data on the device.

3. How is P0128 diagnosed?

The most typical cause of P0128 is a thermostat is jammed open in the engine cooling system. And, this may be diagnosed by feeling the radiator pipe and keeping an eye on the temperature of the coolant that flows through the radiator hose.

4. Why does a Duramax have 2 thermostats?

They are primarily designed to improve aerodynamics rather than cool the engine. To provide the same temperature regulation under varied load circumstances, the dual thermostatic system was devised. As an alternative to manipulating the air side of the radiators, coolant flow is adjusted to the radiator.

5. How do I know if my Duramax head gasket is blown?

After running the engine for a few hours, shut it off and allow it to cool down for at least eight hours. If you can open the coolant reservoir top without releasing air or pressure and the upper radiator hose is still stiff, your head gaskets have almost probably failed.

Final Words

When your car’s coolant temperature falls below the diagnostic monitoring temperature, the P01F0 code will appear.

If this happens, be sure to take your car in for service right away.

Your car’s thermostat may be malfunctioning, in which case you will need to replace it. Or you may just be short on coolant, in which case you may simply top up your coolant reservoir.

Consider the first possibility, and then decide whether you need coolant or a thermostat instead.

Wait and watch what happens when you add extra coolant to your vehicle.

As long as you’re experiencing the same issues, your thermostat is to blame, not your coolant.

Until then, be sure to keep an eye on your coolant temperature and take care of your car properly to avoid any further damage.

Want more articles like this? Here are other related articles you might like:

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Who Worked on This post?



Anderson is an experienced auto mechanic with over 10 years in the industry. He is skilled in diagnosing and repairing a wide range of vehicles, from sedans to trucks and SUV

Syed Ahmed


Syed Ahmed has been working as an auto mechanic editor for the past five years. He has a background in mechanical engineering and a love for all things automotive

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