AutoCodes – Chevrolet – P037B 2018 Chevrolet Silverado

P037B 2018 Chevrolet Silverado Code - Wait To Start Indicator Control Circuit High 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: P037B 2018 Chevrolet Silverado indicates Wait To Start Indicator Control Circuit High 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 294

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P037B 2018 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 voltage on the Wait To Start Indicator Control circuit for greater than 1 s.

OBDII Code P037B 2018 Chevrolet Silverado - Wait To Start Indicator Control Circuit High Voltage - AutoCodes.com — P037B 2018 Chevrolet Silverado Code - Wait To Start Indicator Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P037B 2018 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 P037B 2018 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 P037B 2018 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 P037B 2018 Chevrolet Silverado code?

Need more information on how to fix the P037B 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P037B 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P037B 2018 Chevrolet Silverado Code

1. What does the OBDII code P037B mean for a 2018 Chevrolet Silverado?

The P037B code indicates a high voltage issue in the Wait to Start Indicator Control Circuit, which is part of the diesel engine's glow plug system.

2. What are the common symptoms of the P037B code?

Symptoms may include the "Wait to Start" light not functioning properly, difficulty starting the engine in cold weather, or no noticeable symptoms at all.

3. What causes the P037B code on a 2018 Chevrolet Silverado?

Possible causes include a faulty wait-to-start indicator, damaged wiring or connectors in the circuit, or a malfunctioning engine control module (ECM).

4. Can I still drive my Silverado with the P037B code active?

Yes, but starting the engine in cold weather may become difficult, and ignoring the issue could lead to further damage.

5. How do I diagnose the P037B code?

Diagnosis involves checking the wait-to-start indicator bulb, inspecting electrical connections and wiring for damage, and testing the ECM for proper function.

6. How do I fix the P037B code on my Silverado?

Repairs may involve replacing the wait-to-start indicator bulb, repairing damaged wiring, or reprogramming or replacing the ECM if needed.

7. Is the P037B code specific to diesel engines?

Yes, it is specific to diesel engines because it relates to the wait-to-start system, which is used to preheat glow plugs.

8. What tools are needed to troubleshoot the P037B code?

Common tools include an OBDII scanner, a multimeter for testing voltages, and wiring diagrams for the vehicle.

9. How much does it cost to repair the P037B code?

Costs vary depending on the issue, but replacing a bulb or repairing wiring is relatively inexpensive, while ECM replacement can be more costly.

10. Can a faulty battery cause the P037B code?

A weak or failing battery is unlikely to directly cause the P037B code but can contribute to related electrical issues, so checking the battery is recommended.