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Engine-Codes – Chevrolet – P037B 2014 Chevrolet Silverado

P037B 2014 Chevrolet Silverado Code - Wait To Start Indicator Control Circuit High Voltage

Quick Answer

The P037B code indicates that the "Wait To Start" indicator control circuit is experiencing high voltage, which can significantly impact the vehicle's performance, particularly in diesel engines. Common causes include Faulty Glow Plug Control Module: A malfunctioning control module may send incorrect voltage signals, Wiring Issues: Damaged or corroded wiring in the control circuit can lead to high voltage readings, Defective Glow Plugs: If one or more glow plugs are faulty, it can affect the entire system's performance. 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 2014 Chevrolet Silverado indicates Wait To Start Indicator Control Circuit High Voltage.
Common causes
Common causes include Faulty Glow Plug Control Module: A malfunctioning control module may send incorrect voltage signals, Wiring Issues: Damaged or corroded wiring in the control circuit can lead to high voltage readings, Defective Glow Plugs: If one or more glow plugs are faulty, it can affect the entire system's performance.
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 Oct 21, 2024
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Code P037B 2014 Chevrolet Silverado Description

The P037B code indicates that the "Wait To Start" indicator control circuit is experiencing high voltage, which can significantly impact the vehicle's performance, particularly in diesel engines. This code is particularly relevant for vehicles equipped with a diesel engine, where the "Wait To Start" light serves as an essential indicator for the pre-heating of the glow plugs. When the engine is cold, the glow plugs heat the air in the combustion chamber to facilitate easier starting. If the control circuit for this indicator is reporting high voltage, it suggests a potential malfunction in the electrical system that could lead to improper operation of the glow plugs.

OBDII Code P037B 2014 Chevrolet Silverado - Wait To Start Indicator Control Circuit High Voltage
P037B 2014 Chevrolet Silverado Code - Wait To Start Indicator Control Circuit High Voltage

Common Causes of P037B 2014 Chevrolet Silverado

  1. Faulty Glow Plug Control Module: A malfunctioning control module may send incorrect voltage signals.
  2. Wiring Issues: Damaged or corroded wiring in the control circuit can lead to high voltage readings.
  3. Defective Glow Plugs: If one or more glow plugs are faulty, it can affect the entire system's performance.
  4. Battery or Alternator Problems: Voltage irregularities from the battery or alternator can cause high voltage in the control circuit.
  5. Short Circuits: A short circuit in the wiring harness can lead to excessive voltage being sent to the control module.

Symptoms of P037B 2014 Chevrolet Silverado

  1. Hard Starting: Difficulty starting the engine, especially in cold weather conditions.
  2. Check Engine Light: The illumination of the check engine light on the dashboard.
  3. Poor Engine Performance: Reduced power or sluggish acceleration due to improper combustion.
  4. Increased Emissions: Higher than normal emissions output, potentially leading to failing emissions tests.
  5. Erratic Glow Plug Operation: The "Wait To Start" light may remain illuminated longer than usual or not illuminate at all.

How to Fix P037B 2014 Chevrolet Silverado

  1. Diagnostic Scan: Begin with a diagnostic scan to confirm the P037B code and check for any related codes that may provide additional context.
  2. Visual Inspection: Conduct a thorough visual inspection of the wiring and connectors associated with the glow plug control circuit for signs of damage or corrosion.
  3. Test Glow Plug Control Module: Use a multimeter to test the glow plug control module for proper operation and voltage output.
  4. Check Glow Plugs: Inspect and test each glow plug to ensure they are functioning correctly and replace any that are defective.
  5. Repair or Replace Wiring: If any damaged wiring or connectors are found, repair or replace them as necessary to restore proper circuit function.

Cost to Fix P037B 2014 Chevrolet Silverado

The typical repair costs for addressing a P037B code can range from $200 to $800, depending on the specific repairs needed. This estimate includes parts such as glow plugs or a glow plug control module, which can vary in price. Labor costs can also fluctuate based on the complexity of the repair and the shop's hourly rate. Most auto repair shops charge between $80 and $150 per hour; however, rates can be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It is advisable to check local rates for a more precise estimate and to consider that diagnostic time may also vary based on the shop's workload and expertise.

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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 P037B 2014 Chevrolet Silverado Code

1. What does the OBDII code P037B mean on a 2014 Chevrolet Silverado?

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

2. What are the common symptoms of code P037B in a 2014 Chevrolet Silverado?

Common symptoms include the Wait to Start indicator not functioning properly, delayed engine starting, or the engine failing to start in cold weather.

3. What causes the P037B code to appear on a 2014 Chevrolet Silverado?

Possible 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 short to voltage.

4. Can code P037B affect engine performance in a 2014 Chevrolet Silverado?

Yes, it can lead to starting issues, especially in cold weather, as the glow plug system may not operate correctly.

5. How do you diagnose the P037B code on a 2014 Chevrolet Silverado?

Diagnosis involves 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 functionality.

6. Is it safe to drive a 2014 Chevrolet Silverado with a P037B code?

While the truck may still be drivable, starting issues in cold weather and potential damage to the glow plug system make it advisable to address the issue promptly.

7. How can you fix the P037B code on a 2014 Chevrolet Silverado?

Repairs may include replacing the Wait to Start indicator bulb, repairing or replacing damaged wiring or connectors, or replacing a faulty glow plug control module.

8. What tools are needed to troubleshoot the P037B code on a 2014 Chevrolet Silverado?

You may need a scan tool to read and clear codes, a multimeter to check voltages, and basic hand tools for inspecting and repairing wiring or components.

9. How much does it cost to repair the P037B code on a 2014 Chevrolet Silverado?

Repair costs vary depending on the issue, but replacing a bulb or repairing wiring is generally inexpensive, while a new glow plug control module can cost several hundred dollars including labor.

10. Can a low battery cause the P037B code on a 2014 Chevrolet Silverado?

A low battery is unlikely to directly cause this code, but electrical issues such as voltage spikes or unstable power can contribute to circuit problems.

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