P037B 2014 GMC Sierra Code - Wait To Start Indicator Control Circuit High Voltage
Quick Answer
The P037B diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Wait To Start Indicator Control Circuit, specifically that the voltage is too high. Common causes include Faulty glow plug relay, Damaged wiring or connectors in the circuit, Malfunctioning glow plug control module. 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 GMC Sierra indicates Wait To Start Indicator Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug relay, Damaged wiring or connectors in the circuit, Malfunctioning glow plug control module.
- 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 P037B 2014 GMC Sierra Description
The P037B diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Wait To Start Indicator Control Circuit, specifically that the voltage is too high. This code is typically associated with diesel engines and is related to the glow plug system. The Wait To Start Indicator is a light on the dashboard that informs the driver when the glow plugs are heating up before starting the engine. When this circuit has high voltage, it can lead to issues with the glow plug system, affecting the vehicle's ability to start properly, especially in cold weather conditions.
Common Causes of P037B 2014 GMC Sierra
- Faulty glow plug relay
- Damaged wiring or connectors in the circuit
- Malfunctioning glow plug control module
- Defective glow plugs
- Corrosion or poor connections in the circuit
Symptoms of P037B 2014 GMC Sierra
- Extended cranking times before the engine starts
- Rough idling or misfiring
- Stalling or difficulty starting the engine
- Illumination of the Check Engine Light
- Decreased fuel efficiency
How to Fix P037B 2014 GMC Sierra
- Begin by performing a thorough inspection of the glow plug system, checking for any visible damage to wiring or connectors.
- Test the glow plug relay and control module to determine if they are functioning correctly.
- Check the resistance of the glow plugs to ensure they are within the manufacturer's specifications.
- Replace any faulty components, such as the glow plug relay, control module, or glow plugs, as needed.
- Clear the DTC from the vehicle's computer using a diagnostic scanner and test the vehicle to ensure the issue has been resolved.
Cost to Fix P037B 2014 GMC Sierra
The cost of repairing a P037B DTC can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this code could range from $200 to $500, including parts and labor. However, it is essential to note that labor rates at auto repair shops can vary significantly, so it is advisable to obtain quotes from multiple shops to ensure a competitive price. Additionally, the cost of diagnostic time and any additional repairs that may be needed should be factored into the overall estimate.
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Frequently Asked Questions about P037B 2014 GMC Sierra Code
What does the OBDII code P037B mean on a 2014 GMC Sierra?
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.
What are the common symptoms of the P037B code?
Symptoms may include the Wait to Start indicator not functioning properly, difficulty starting the engine in cold weather, or the Check Engine Light being illuminated.
What causes the P037B code on a 2014 GMC Sierra?
Common causes include a faulty Wait to Start indicator bulb, damaged wiring or connectors in the circuit, or a malfunctioning engine control module (ECM).
Can I still drive my 2014 GMC Sierra with the P037B code?
Yes, you can drive the truck, but starting the engine in cold temperatures may be more difficult, and ignoring the issue could lead to further damage over time.
How do I troubleshoot the P037B code?
Start by inspecting the Wait to Start indicator bulb, checking the wiring and connectors for damage, and testing the circuit for proper voltage levels.
What tools are needed to diagnose the P037B code?
You’ll need an OBDII scanner, a multimeter for voltage testing, and potentially a wiring diagram for the Wait to Start circuit.
How much does it cost to fix the P037B code?
Repair costs can vary but typically range from $50 to $200, depending on whether the issue is a faulty bulb, damaged wiring, or a more complex ECM problem.
Can a bad glow plug cause the P037B code?
No, the P037B code specifically relates to the Wait to Start indicator circuit and not the glow plugs themselves.
Is the P037B code specific to diesel engines?
Yes, this code is specific to diesel engines, as the Wait to Start indicator is part of the glow plug system used in these engines.
Can resetting the Check Engine Light clear the P037B code?
Temporarily clearing the code with a scanner may turn off the light, but if the underlying issue isn’t fixed, the code will likely return.
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