AutoCodes – Chevrolet – P037A 2015 Chevrolet Silverado

P037A 2015 Chevrolet Silverado 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 Chevrolet Silverado 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 208

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 Chevrolet Silverado 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 Chevrolet Silverado - Wait To Start Indicator Control Circuit Low Voltage - AutoCodes.com — P037A 2015 Chevrolet Silverado Code - Wait To Start Indicator Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P037A 2015 Chevrolet Silverado?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P037A 2015 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.

Need more information about the P037A 2015 Chevrolet Silverado code?

Need more information on how to fix the P037A 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 Chevrolet Silverado Code

1. What does the OBDII code P037A mean on a 2015 Chevrolet Silverado?

P037A indicates a problem with the "Wait to Start" indicator control circuit, specifically low voltage being detected in the circuit.

2. What are the common symptoms of code P037A on a 2015 Chevrolet Silverado?

Symptoms may include the "Wait to Start" indicator not illuminating, delayed engine starting, or no noticeable symptoms at all.

3. What causes the P037A code to appear in a 2015 Chevrolet Silverado?

Common causes include a faulty "Wait to Start" indicator bulb, damaged wiring, a malfunctioning glow plug control module, or corroded electrical connections.

4. Can I drive my 2015 Chevrolet Silverado with the P037A code?

Yes, you can likely drive with this code, but ignoring it may lead to issues with the glow plug system and harder cold starts over time.

5. How can I fix the P037A code on my 2015 Chevrolet Silverado?

Repairs may involve checking and replacing the "Wait to Start" indicator bulb, repairing damaged wiring, cleaning corroded connections, or replacing the glow plug control module if necessary.

6. How do I diagnose the P037A code on a 2015 Chevrolet Silverado?

Start by inspecting the "Wait to Start" indicator bulb, checking the wiring and connectors for damage or corrosion, and testing the glow plug control module for proper operation.

7. What tools are needed to fix the P037A code on a 2015 Chevrolet Silverado?

You may need a multimeter to check for voltage issues, a scan tool to clear the code, and basic hand tools to access and replace components.

8. Is the P037A code related to the glow plug system on my 2015 Chevrolet Silverado?

Yes, the "Wait to Start" indicator is part of the glow plug system, which is essential for starting the engine in cold conditions.

9. How much does it cost to repair the P037A code on a 2015 Chevrolet Silverado?

Repair costs can vary, but replacing a bulb or repairing wiring may cost under $100, while replacing the glow plug control module could cost $200-$500, including labor.

10. Can a low battery cause the P037A code on a 2015 Chevrolet Silverado?

Yes, a weak or low battery can potentially cause low voltage issues in the circuit and trigger the P037A code.