AutoCodes – Chevrolet – P0037 2014 Chevrolet Silverado

P0037 2014 Chevrolet Silverado Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor Bank 1 Sensor 2 harness is open shorted to ground, Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection. 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 2014 Chevrolet Silverado indicates HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor Bank 1 Sensor 2 harness is open shorted to ground, Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection.
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 698

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 25, 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 2014 Chevrolet Silverado Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.

OBDII Code P0037 2014 Chevrolet Silverado - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com — P0037 2014 Chevrolet Silverado Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0037 2014 Chevrolet Silverado?

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

How to Fix the DTC P0037 2014 Chevrolet Silverado?

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. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0037 2014 Chevrolet Silverado 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.

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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 2014 Chevrolet Silverado Code

What does the OBDII code P0037 mean for a 2014 Chevrolet Silverado?

P0037 indicates a low voltage issue in the heater control circuit for Bank 1 Sensor 2's heated oxygen sensor (HO2S).

What are the common symptoms of the P0037 code?

Common symptoms include a check engine light, decreased fuel efficiency, rough idle, and poor engine performance.

What could cause the P0037 code to trigger?

Possible causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues in the engine control module (ECM).

How can I diagnose the P0037 code?

Start by visually inspecting the wiring and connectors for damage, then use a multimeter to test the voltage at the sensor and check for continuity.

Is it safe to drive with the P0037 code?

While it may be safe to drive short distances, it's advisable to address the issue promptly to avoid potential damage to the engine or exhaust system.

What repairs are typically needed to fix the P0037 code?

Repairs may involve replacing the faulty oxygen sensor, repairing or replacing damaged wiring or connectors, or fixing any issues with the fuse or ECM.

How can I prevent the P0037 code from recurring?

Regular maintenance, including checking and replacing worn wiring and connectors, can help prevent issues. Additionally, ensuring the exhaust system is free of leaks will maintain sensor functionality.

Can I reset the check engine light after fixing the P0037 code?

Yes, you can reset the check engine light using an OBDII scanner after making the necessary repairs. However, ensure the underlying issue is resolved first.

Will ignoring the P0037 code cause further damage?

Yes, ignoring the code can lead to decreased fuel economy, increased emissions, and potential damage to other engine components over time.