AutoCodes – GMC – P2437 GMC

P2437 GMC Code - Secondary Air Injection System Pressure Sensor Circuit Low Voltage Bank 2

Quick Answer

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. Common causes include Faulty Secondary Air Injection System Pressure Sensor, Secondary Air Injection System Pressure Sensor harness is open or shorted, Secondary Air Injection System Pressure Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2437 GMC indicates Secondary Air Injection System Pressure Sensor Circuit Low Voltage Bank 2.
Common causes: Common causes include Faulty Secondary Air Injection System Pressure Sensor, Secondary Air Injection System Pressure Sensor harness is open or shorted, Secondary Air Injection System Pressure Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,384

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 25, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2437 GMC Description

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the exhaust stream in order to accelerate the catalyst operation. Secondary air injection pressure sensors, which are integral to the shutoff and check valves, are used to monitor the air flow from the secondary air injection pump. The Engine Control Module (ECM) supplies voltage to the 5 V reference circuits and provides a ground for the low reference circuits. The sensors provide a signal voltage to the ECM relative to the pressure changes within the secondary air injection system.
The Diagnostic Trouble Code (DTC) will set when the ECM detects that the corresponding bank 2 secondary air injection pressure sensor signal is out of specifications.

OBDII Code P2437 GMC - Secondary Air Injection System Pressure Sensor Circuit Low Voltage Bank 2 - AutoCodes.com — P2437 GMC Code - Secondary Air Injection System Pressure Sensor Circuit Low Voltage Bank 2

What does this mean?

What are the Possible Causes of the DTC P2437 GMC?

Faulty Secondary Air Injection System Pressure Sensor
Secondary Air Injection System Pressure Sensor harness is open or shorted
Secondary Air Injection System Pressure Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2437 GMC?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2437 GMC 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 P2437 GMC code?

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Need Help with the Code?

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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 P2437 GMC Code

1. What are the common symptoms of OBDII code P2437 in a GMC vehicle?

The common symptoms of P2437 include the Check Engine Light illuminating, rough engine idle, decreased engine performance, and potential stalling.

2. What can cause the OBDII code P2437 to trigger in a GMC vehicle?

The P2437 code typically triggers due to a malfunction in the Secondary Air Injection System Pressure Sensor Circuit on Bank 2, which can be caused by sensor failure, wiring issues, or a faulty control module.

3. How serious is the OBDII code P2437 in a GMC vehicle?

While the P2437 code may not cause immediate drivability issues, it can lead to increased emissions and potential damage to the catalytic converter if left unresolved. It is recommended to address the issue promptly.

4. How can I diagnose the OBDII code P2437 in my GMC vehicle?

Diagnosing P2437 usually involves using a scan tool to retrieve the code, inspecting the secondary air injection system components, checking the wiring and connections, and testing the pressure sensor for proper function.

5. Can I continue driving my GMC with the OBDII code P2437?

It is generally not recommended to drive your GMC with the P2437 code present, as unresolved issues with the Secondary Air Injection System can lead to increased emissions and potential engine damage over time.

6. How can I repair the OBDII code P2437 in my GMC vehicle?

Repairing P2437 may involve replacing the Secondary Air Injection System Pressure Sensor, repairing any damaged wiring or connectors, or addressing issues with the control module as necessary.

7. Can a DIY enthusiast fix the OBDII code P2437 in a GMC vehicle?

While some experienced DIY enthusiasts may be able to diagnose and repair the P2437 code themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

8. Are there any preventive maintenance tips to avoid the OBDII code P2437 in a GMC vehicle?

Regularly inspecting the secondary air injection system components, maintaining proper engine performance, and addressing any issues promptly can help prevent the occurrence of the P2437 code in your GMC vehicle.

9. Will resetting the Check Engine Light resolve the OBDII code P2437 in my GMC vehicle?

Resetting the Check Engine Light may temporarily turn off the warning indicator, but it will not address the underlying issue causing the P2437 code to trigger. It is important to diagnose and repair the root cause of the problem.

10. How long does it typically take to repair the OBDII code P2437 in a GMC vehicle?

The repair time for P2437 can vary depending on the exact cause of the issue and the complexity of the repair needed. It is best to consult with a professional mechanic for an accurate estimate of the repair time.