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Engine-Codes – GMC – P037A 2015 GMC Sierra

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

Quick Answer

The P037A diagnostic trouble code (DTC) in a 2015 GMC Sierra refers to the Wait To Start Indicator Control Circuit Low Voltage. Common causes include Faulty wait to start indicator control circuit, Damaged wiring or connectors in the circuit, Malfunctioning wait to start indicator light. 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 wait to start indicator control circuit, Damaged wiring or connectors in the circuit, Malfunctioning wait to start indicator light.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P037A 2015 GMC Sierra Description

The P037A diagnostic trouble code (DTC) in a 2015 GMC Sierra refers to the Wait To Start Indicator Control Circuit Low Voltage. This code indicates that there is a problem with the circuit that controls the wait to start indicator light in the vehicle. The wait to start indicator light is crucial for diesel engines as it informs the driver when the engine is ready to be started after the glow plugs have heated up sufficiently.

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

Common Causes of P037A 2015 GMC Sierra

  1. Faulty wait to start indicator control circuit
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning wait to start indicator light
  4. Issues with the engine control module (ECM)
  5. Corrosion or poor connections in the circuit

Symptoms of P037A 2015 GMC Sierra

  1. Extended cranking times before the engine starts
  2. Inconsistent or non-functioning wait to start indicator light
  3. Rough idling or stalling after starting
  4. Reduced fuel efficiency
  5. Check Engine Light illuminated

How to Fix P037A 2015 GMC Sierra

  1. Begin by performing a visual inspection of the wiring and connectors related to the wait to start indicator circuit. Look for any signs of damage, corrosion, or loose connections.
  2. Test the wait to start indicator light to ensure it is functioning correctly. Replace the light if necessary.
  3. Use a multimeter to test the voltage in the control circuit. If the voltage is low, check for any short circuits or open circuits that may be causing the issue.
  4. If the problem persists, consider replacing the engine control module (ECM) as it may be faulty and causing the low voltage in the circuit.
  5. Clear the DTC and test the vehicle to ensure the issue has been resolved.

Cost to Fix P037A 2015 GMC Sierra

The typical repair costs for addressing the P037A code in a 2015 GMC Sierra can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with rates typically ranging between $80 and $150 per hour. Factors such as location, vehicle make and model, and engine type can also influence the final repair costs. It's recommended to consult with a qualified mechanic to get an accurate estimate based on your specific situation.

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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.

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