AutoCodes – GMC – P037A 2015 GMC Sierra

P037A 2015 GMC Sierra Code - Wait To Start Indicator Control Circuit Low Voltage

Quick Answer

Ignition voltage is supplied directly to the Wait To Start indicator. Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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: P037A 2015 GMC Sierra indicates Wait To Start Indicator Control Circuit Low Voltage.
Common causes: Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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 139

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 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P037A 2015 GMC Sierra Description

Ignition voltage is supplied directly to the Wait To Start indicator. The Engine Control Module (ECM) controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which is monitored by the ECM. When the ECM is commanding a component ON, the voltage of the control circuit should be low, near zero volts. When the ECM is commanding the control circuit to a component OFF, the voltage potential of the circuit should be high, near battery voltage. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground on the Wait To Start Indicator Control circuit for greater than 3 s.

OBDII Code P037A 2015 GMC Sierra - Wait To Start Indicator Control Circuit Low Voltage - AutoCodes.com — P037A 2015 GMC Sierra Code - Wait To Start Indicator Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P037A 2015 GMC Sierra?

Faulty Instrument Cluster
Instrument Cluster harness is open or shorted
Instrument Cluster circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P037A 2015 GMC Sierra?

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 P037A 2015 GMC Sierra 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 P037A 2015 GMC Sierra 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 P037A 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P037A in a 2015 GMC Sierra?

The common symptoms of OBDII code P037A, Wait To Start Indicator Control Circuit Low Voltage, in a 2015 GMC Sierra may include difficulty starting the vehicle, the "Wait To Start" indicator not functioning properly, and an illuminated check engine light.

2. What causes the OBDII code P037A to trigger in a 2015 GMC Sierra?

The OBDII code P037A is typically triggered in a 2015 GMC Sierra due to issues with the control circuit of the "Wait To Start" indicator, such as low voltage in the circuit.

3. How serious is the OBDII code P037A in a 2015 GMC Sierra?

While the OBDII code P037A may not cause immediate drivability issues, it is still important to address this code promptly to ensure proper functioning of the "Wait To Start" indicator and overall vehicle performance.

4. Can I continue driving my 2015 GMC Sierra with the OBDII code P037A present?

It is generally not recommended to continue driving your 2015 GMC Sierra with the OBDII code P037A present, as unresolved issues with the indicator control circuit could potentially lead to starting problems or other related issues.

5. How can I diagnose the OBDII code P037A in my 2015 GMC Sierra?

Diagnosing the OBDII code P037A in a 2015 GMC Sierra typically involves using a diagnostic scanner to retrieve the fault code, inspecting the "Wait To Start" indicator circuit for any visible damage, and testing the voltage in the circuit.

6. What are some common repair tips for fixing the OBDII code P037A in a 2015 GMC Sierra?

Common repair tips for addressing the OBDII code P037A in a 2015 GMC Sierra include checking and repairing any damaged wiring in the indicator control circuit, ensuring proper voltage levels, and resetting the fault code after making necessary repairs.

7. Can a DIY enthusiast fix the OBDII code P037A issue in a 2015 GMC Sierra?

While some DIY enthusiasts may be able to address the OBDII code P037A in a 2015 GMC Sierra by following repair guides and using the right tools, it is recommended to seek professional help if unsure about the diagnosis or repair process.

8. Will resetting the OBDII code P037A in my 2015 GMC Sierra make it go away permanently?

Resetting the OBDII code P037A in your 2015 GMC Sierra may clear the fault code temporarily, but if the underlying issue with the "Wait To Start" indicator control circuit is not fixed, the code is likely to reappear.

9. Are there any recalls or technical service bulletins related to the OBDII code P037A in a 2015 GMC Sierra?

It is advisable to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to the OBDII code P037A in a 2015 GMC Sierra.

10. How much can I expect to pay for repairing the OBDII code P037A in my 2015 GMC Sierra at a mechanic or dealership?

The cost of repairing the OBDII code P037A in a 2015 GMC Sierra can vary depending on the extent of the issue, labor rates, and parts needed. It is recommended to obtain estimates from different mechanics or dealerships to compare prices.