P0037 H02S heater control circuit low (Bank 1 sensor 2)

P0037 code means that there is a problem with the heater control circuit of the oxygen sensor on one side of your engine. This can cause your car to run poorly and use more gas.

What Does P0037 Code Mean and How to Fix It?

When you see a check engine light on your dashboard, it means that something is wrong with your engine or its parts. You can use a device called an OBD2 scanner to find out what the problem is. The device will show you a code that tells you what the problem is. 

One of the codes that you might see is P0037. This code means that there is a problem with a part called the oxygen sensor on one side of your engine. The oxygen sensor is a small device that measures how much oxygen and fuel are in your engine. It helps your engine run better and use less gas.

The oxygen sensor has a part inside it that heats up when you start your engine. This part is called the heater element. It helps the oxygen sensor work faster and more accurately.

The problem is that the heater element is not getting enough power from your car’s computer. The computer is called the PCM. The PCM controls your engine and its parts. It sends power to the heater element through a wire. This wire is called the heater control circuit.

The code P0037 means that the PCM has detected that the power in the heater control circuit is too low. This can be caused by different things, such as:

• A bad oxygen sensor
• A bad PCM
• A broken or shorted wire
• A bad fuse or relay

The code P0037 is similar to other codes that also mean that there is a problem with the oxygen sensor heater circuit. These codes are:

• P0031: The power in the heater control circuit is too low on the other side of your engine.
• P0032: The power in the heater control circuit is too high on one side of your engine.
• P0038: The power in the heater control circuit is too high on the other side of your engine.
• P0050: The power in the heater control circuit is too low on another oxygen sensor after your car’s exhaust system.
• P0051: The power in the heater control circuit is too low on another oxygen sensor after your car’s exhaust system.
• P0052: The power in the heater control circuit is too high on another oxygen sensor after your car’s exhaust system.
• P0040: The power in the heater control circuit is too low on another oxygen sensor after your car’s exhaust system.

How Do You Know If You Have P0037 Code?

If you have P0037 code, you might notice some signs that tell you that something is wrong with your car, such as:

• Your check engine light is on
• Your car uses more gas than usual
• Your car does not run smoothly or hesitates when you speed up
• Your car makes a rough or loud noise when you idle or drive
• Your car stalls or shuts off
• Your car does not pass an emissions test

How Do You Fix P0037 Code?

To fix P0037 code, you will need some tools and skills, such as:

1. An OBD2 scanner
2. A multimeter
3. A repair manual for your car model
4. Basic knowledge of how to work on your car

You will also need to follow these steps:

• Check the oxygen sensor. Find the oxygen sensor on one side of your engine. It looks like a small metal cylinder with wires coming out of it. It is attached to a pipe that comes out of your engine and goes to your exhaust system. Unplug the wires from the oxygen sensor and look at it closely. See if it has any cracks, burns, or rust on it. If it does, you need to replace it with a new one.
• Check the voltage in the heater control circuit. Plug the wires back into the oxygen sensor and turn on your car. Use a multimeter to measure how much power is going through the wires. You can find out how to do this in your repair manual. If there is no power or very little power in the wires, there might be a problem with the wire itself or with something else that gives power to the wire, such as a fuse or a relay.
• Check the PCM. The PCM is a small box that controls your engine and its parts. It is usually located under your dashboard or under your hood. Look at it and see if it has any damage or corrosion on it. If it does, you need to replace it with a new one.

How Much Does It Cost to Fix P0037 Code?

The cost to fix P0037 code depends on what is causing the problem and where you get it fixed. If you fix it yourself, you will only need to pay for the parts and tools that you need. If you take it to a mechanic, you will also need to pay for their labor and service fees.

If the problem is caused by a bad oxygen sensor, you will need to pay around $100-$200 for a new one. If the problem is caused by a broken or shorted wire, you might need to pay more to replace the whole wiring harness. If the problem is caused by a bad fuse or relay, you will need to pay around $10-$20 for a new one. If the problem is caused by a bad PCM, you will need to pay around $500-$1000 for a new one.

How Can You Prevent P0037 Code?

There are some things that you can do to prevent P0037 code from happening again, such as:

• Use good quality engine oil that is suitable for your car
• Change your engine oil and filter regularly according to your car’s manual
• Do not overfill your engine oil
• Keep your engine coolant at the right level
• Check your exhaust system for any leaks or holes

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