AutoCodes – KIA – P0037 KIA

P0037 KIA Code - HO2S 12 Hater Circuit Low Input

Quick Answer

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0037 KIA indicates HO2S 12 Hater Circuit Low Input.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 21,774

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0037 KIA Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

OBDII Code P0037 KIA - HO2S 12 Hater Circuit Low Input - AutoCodes.com — P0037 KIA Code - HO2S 12 Hater Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0037 KIA?

Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse
Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted
Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0037 KIA?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0037 KIA code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0037 KIA code?

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Need Help with the Code?

Get the P0037 KIA code diagnosed by a professional: Find a repair shop in your area

Information for Specific KIA Models

P0037 2007 KIA Sorento — HO2S 12 Hater Circuit Low Input
P0037 2008 KIA Sorento — HO2S 12 Hater Circuit Low Input
P0037 2009 KIA Sorento — HO2S 12 Hater Circuit Low Input

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0037 KIA Code

1. What does the OBDII code P0037 mean on a KIA?

P0037 indicates a problem with the Heater Circuit Low Input for the downstream oxygen sensor (HO2S 12) on Bank 1.

2. What are the common symptoms of the P0037 code on a KIA vehicle?

Symptoms may include an illuminated check engine light, decreased fuel efficiency, and potential failure to pass emissions tests.

3. What causes the P0037 code to appear in a KIA?

The most common causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning powertrain control module (PCM).

4. Can I still drive my KIA with the P0037 code active?

Yes, but it is not recommended for long periods as it may lead to higher emissions, reduced fuel efficiency, and potential catalytic converter damage.

5. How do I diagnose the P0037 code on my KIA?

Diagnosis involves checking the oxygen sensor heater circuit for continuity, inspecting wiring and connectors for damage, and testing the sensor's resistance and voltage.

6. How can I fix the P0037 code on my KIA?

Repairs may include replacing the oxygen sensor, repairing damaged wiring, replacing a blown fuse, or, in rare cases, addressing issues with the PCM.

7. How much does it cost to fix the P0037 code on a KIA?

Replacing the oxygen sensor typically costs between $150 and $300, including parts and labor. Costs may vary depending on the vehicle model and location.

8. Can a bad oxygen sensor cause the P0037 code on a KIA?

Yes, a faulty downstream oxygen sensor is one of the most common causes of this code.

9. Does the P0037 code affect engine performance in my KIA?

While it may not directly affect engine performance, it can negatively impact fuel economy and emissions control.

10. Will clearing the P0037 code solve the issue in my KIA?

Clearing the code without addressing the root cause will only temporarily erase it. The code will likely return if the underlying issue isnâ€™t fixed.