AutoCodes – Chevrolet – P037A 2016 Chevrolet Silverado

P037A 2016 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 2016 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 186

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 2016 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 2016 Chevrolet Silverado - Wait To Start Indicator Control Circuit Low Voltage - AutoCodes.com — P037A 2016 Chevrolet Silverado Code - Wait To Start Indicator Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P037A 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the P037A 2016 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 2016 Chevrolet Silverado Code

What does the OBDII code P037A mean on a 2016 Chevrolet Silverado?

The P037A code indicates a low voltage issue in the Wait To Start Indicator Control Circuit, which is responsible for signaling the driver when the engine glow plugs are ready in diesel models.

What are the common symptoms of code P037A in a 2016 Chevrolet Silverado?

Symptoms may include the Wait To Start indicator not functioning, difficulty starting the engine, poor engine performance, or illumination of the check engine light.

What causes the P037A code to appear on a Chevrolet Silverado?

Common causes include a faulty Wait To Start indicator bulb, damaged wiring or connectors in the control circuit, a malfunctioning glow plug control module, or a failing ECM.

How can I diagnose the P037A code on my 2016 Silverado?

Start by inspecting the Wait To Start indicator bulb, wiring, and connectors. Use a multimeter to check for voltage and continuity in the circuit, and scan the glow plug control module for faults.

Can driving with the P037A code damage my Silverado?

Driving with this code may not immediately harm the vehicle, but ignoring it could lead to starting issues or additional engine problems over time, especially in cold weather.

How is the P037A code fixed on a 2016 Chevrolet Silverado?

Repairs may involve replacing the Wait To Start indicator bulb, repairing damaged wiring or connectors, replacing the glow plug control module, or reprogramming the ECM.

Is the P037A code specific to diesel engines?

Yes, the P037A code is specific to diesel models, as it relates to the Wait To Start indicator for glow plug operation.

Can a weak battery cause the P037A code in a Silverado?

Yes, a weak or failing battery can lead to low voltage in the Wait To Start Indicator Control Circuit, potentially triggering the P037A code.

How much does it cost to fix the P037A code on a 2016 Chevrolet Silverado?

Repair costs vary depending on the issue but typically range from $50 to $300 for parts and labor, depending on whether you need a simple bulb replacement or a new control module.

Can I reset the P037A code without fixing the problem?

While you can clear the code using an OBDII scanner, it will likely return unless the underlying issue is resolved.