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Engine-Codes – Nissan – P0037 2007 Nissan Versa

P0037 2007 Nissan Versa Code - HO2S12 Heater Control Circuit Low

Quick Answer

The P0037 diagnostic trouble code (DTC) for a 2007 Nissan Versa refers to the Heater Control Circuit Low for the HO2S12 sensor. Common causes include Faulty Oxygen Sensor: The most common cause of this code is a malfunctioning downstream oxygen sensor (HO2S12), Wiring Issues: Damaged or corroded wiring in the heater circuit can prevent proper voltage supply to the oxygen sensor, Heater Circuit Short: A short circuit in the heater circuit can cause the voltage to drop below the required level. 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 2007 Nissan Versa indicates HO2S12 Heater Control Circuit Low.
Common causes
Common causes include Faulty Oxygen Sensor: The most common cause of this code is a malfunctioning downstream oxygen sensor (HO2S12), Wiring Issues: Damaged or corroded wiring in the heater circuit can prevent proper voltage supply to the oxygen sensor, Heater Circuit Short: A short circuit in the heater circuit can cause the voltage to drop below the required level.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0037 2007 Nissan Versa Description

The P0037 diagnostic trouble code (DTC) for a 2007 Nissan Versa refers to the Heater Control Circuit Low for the HO2S12 sensor. This code indicates that there is a problem with the heating element circuit of the downstream oxygen sensor (sensor 2) in bank 1. The oxygen sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases to ensure optimal fuel efficiency and emissions control. The heater circuit is responsible for quickly bringing the sensor up to operating temperature for accurate readings.

OBDII Code P0037 2007 Nissan Versa - HO2S12 Heater Control Circuit Low
P0037 2007 Nissan Versa Code - HO2S12 Heater Control Circuit Low

Common Causes of P0037 2007 Nissan Versa

  1. Faulty Oxygen Sensor: The most common cause of this code is a malfunctioning downstream oxygen sensor (HO2S12).
  2. Wiring Issues: Damaged or corroded wiring in the heater circuit can prevent proper voltage supply to the oxygen sensor.
  3. Heater Circuit Short: A short circuit in the heater circuit can cause the voltage to drop below the required level.
  4. PCM (Powertrain Control Module) Failure: A malfunctioning PCM can also trigger this code by not providing the correct signals to the oxygen sensor.
  5. Exhaust Leak: An exhaust leak near the oxygen sensor can affect its performance and trigger this code.

Symptoms of P0037 2007 Nissan Versa

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Poor Fuel Economy: A malfunctioning oxygen sensor can lead to incorrect fuel mixture readings, resulting in decreased fuel efficiency.
  3. Rough Idle: The engine may experience rough idling or hesitation due to inaccurate oxygen sensor readings.
  4. Failed Emissions Test: If the oxygen sensor is not functioning properly, the vehicle may fail emissions testing.
  5. Reduced Engine Performance: In severe cases, the engine performance may be affected, leading to decreased power and responsiveness.

How to Fix P0037 2007 Nissan Versa

  1. Diagnose the Issue: Use a scan tool to retrieve the DTC and perform a thorough inspection of the oxygen sensor and its wiring.
  2. Replace Oxygen Sensor: If the sensor is faulty, replace the downstream oxygen sensor (HO2S12) with a new one.
  3. Check Wiring: Inspect the wiring harness for any damage or corrosion and repair or replace as necessary.
  4. Test Heater Circuit: Test the heater circuit for proper voltage supply and repair any shorts or open circuits.
  5. Clear Codes: After completing the repairs, clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0037 2007 Nissan Versa

The typical repair costs for addressing a P0037 code on a 2007 Nissan Versa can range from $150 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

What does this mean?

Tech Notes for P0037 2007 Nissan Versa

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.

When is the Code Detected?

The P0037 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit

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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 2007 Nissan Versa Code

1. What does the OBDII code P0037 for a 2007 Nissan Versa mean?

The code P0037 on a 2007 Nissan Versa indicates a potential issue with the HO2S12 heater control circuit, specifically that it is registering a low voltage condition.

2. What are the common symptoms of OBDII code P0037 in a 2007 Nissan Versa?

Common symptoms of code P0037 in a 2007 Nissan Versa may include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine light on the dashboard.

3. What can cause the OBDII code P0037 to trigger in a 2007 Nissan Versa?

The most common causes of code P0037 in a 2007 Nissan Versa are a faulty HO2S12 sensor, damaged wiring or connectors in the heater circuit, or a blown fuse related to the sensor.

4. How can I diagnose the OBDII code P0037 on my 2007 Nissan Versa?

Diagnosing code P0037 on a 2007 Nissan Versa typically involves using a scan tool to retrieve the code, checking the wiring and connectors related to the HO2S12 sensor, and testing the sensor itself for proper operation.

5. Can I continue driving my 2007 Nissan Versa with an active P0037 trouble code?

While the vehicle may still be operable with code P0037 present, it is recommended to address the issue promptly to prevent potential damage to the engine and emissions system.

6. How can I repair the OBDII code P0037 on a 2007 Nissan Versa?

Repairing code P0037 on a 2007 Nissan Versa often involves replacing the HO2S12 sensor, repairing any damaged wiring or connectors, and ensuring the heater circuit is functioning properly.

7. Are there any DIY tips for fixing the OBDII code P0037 on a 2007 Nissan Versa?

If you have experience with automotive repairs, you may be able to replace the HO2S12 sensor yourself after confirming the diagnosis and ensuring you have the necessary tools and parts.

8. How much does it cost to fix the OBDII code P0037 on a 2007 Nissan Versa at a repair shop?

The cost of repairing code P0037 on a 2007 Nissan Versa at a repair shop can vary depending on the labor rates, parts needed, and any additional services required. It's best to get a few quotes from different shops.

9. Can a faulty O2 sensor cause the OBDII code P0037 on a 2007 Nissan Versa?

Yes, a faulty HO2S12 sensor can trigger code P0037 on a 2007 Nissan Versa, as the sensor is responsible for monitoring oxygen levels in the exhaust and helping regulate fuel mixture.

10. Is it safe to reset the Check Engine light after fixing the OBDII code P0037 on a 2007 Nissan Versa?

Once the underlying issue causing code P0037 has been repaired, it is safe to reset the Check Engine light using a scan tool to clear the code and ensure proper operation of the vehicle.

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