Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble talking to the glow plugs, which help the engine start when it's cold.
The P037E code indicates a problem with the electrical circuit that monitors the glow plugs, which are used to heat the engine cylinders in a diesel engine for easier starting.
The glow plug sense circuit is responsible for monitoring the operation of the glow plugs. If the circuit is reading a voltage lower than expected, it may trigger the P037E code. This could be due to a faulty glow plug, wiring issues, or a problem with the glow plug control module.
• Difficulty starting the engine, especially in cold weather
• Check Engine Light is on
• Rough idle when starting the engine
• Faulty glow plug
• Damaged wiring or connectors in the glow plug circuit
• Faulty glow plug control module
Glow Plug: A device used to heat the air in a diesel engine cylinder to aid starting.
Control Module: An electronic device that manages the operation of a system in a vehicle.
• Inspect the glow plugs for damage or wear.
• Check the wiring and connectors for the glow plug circuit.
• Test the glow plug control module for proper operation.
• Replace any faulty glow plugs.
• Repair or replace damaged wiring or connectors.
• Replace the glow plug control module if necessary.
• Multimeter
• OBD-II scanner
• Socket set
$100 - $500
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regularly inspect glow plugs and wiring.
• Perform scheduled maintenance on the glow plug system.
• Use high-quality diesel fuel to prevent deposits.
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid starting the engine repeatedly if it struggles to start.
• Keep the vehicle in a garage during cold weather to help with starting.
Glow plug issues may be covered under powertrain warranty. Check with your vehicle manufacturer.
The P037E code has been observed in diesel engines since the introduction of OBD-II systems, particularly in colder climates where glow plug function is critical.
Moderate – While the vehicle may still run, it could have difficulty starting, especially in cold weather.
Always ensure repairs are performed by a qualified technician to maintain vehicle safety and compliance with emissions regulations.
• Engine cold start
• Ambient temperature below 40°F
The glow plugs are located in the engine cylinder head, and the control module is typically near the engine or in the engine compartment.
Q: Can I drive with a P037E code?
A: You may be able to drive, but starting the engine could become difficult, especially in cold weather. It's best to address the issue promptly.
Q: How do glow plugs work?
A: Glow plugs heat the air in the engine cylinders to help start the engine, especially in cold conditions.
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