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P037E OBD2: Glow Plug Sense Circuit Low

P037E OBD2: Glow Plug Sense Circuit Low

What Does the P037E Code Mean?

The P037E code indicates a problem with the glow plug sense circuit in diesel engines. This code is triggered when the engine control module (PCM) detects that the glow plug circuit is not functioning properly, which can lead to issues with engine starting and performance.

What Causes the P037E Code?

Several factors can cause the P037E code to be set, including:

  • Glow plug control module failure
  • Glow plug failure
  • Powertrain Control Module (PCM) failure
  • Wiring issues in the glow plug circuit

What Are the Symptoms of the P037E Code?

When the P037E code is present, the following symptoms may occur:

  • Engine may not start
  • Hard engine start

How Serious Is the P037E Code?

The P037E code is classified as urgent. Ignoring this code can lead to significant malfunctions that might cause severe damage to the vehicle or pose safety risks to the driver and passengers. Immediate attention is recommended.

How to Diagnose the P037E Code

To properly diagnose the P037E code, a mechanic would typically follow these steps:

  1. Use an OBD-II scanner to confirm the P037E code and check for any related codes.
  2. Inspect the glow plugs and wiring for any visible damage or disconnection.
  3. Test the glow plug control module for proper operation.
  4. Examine the Powertrain Control Module (PCM) for faults.

Common Repairs for the P037E Code

Repairs for the P037E code may include:

  • Glow plug replacement
  • Repair or replacement of the glow plug control module
  • Fixing any wiring issues
  • PCM repair or replacement if necessary

How Much Does It Cost to Fix the P037E Code?

The cost to fix the P037E code varies depending on the specific repair needed. On average, repairs can range from $100 to $500, with glow plug replacement typically costing between $100 and $300, depending on labor rates and parts used.

Can I Fix the P037E Code Myself?

While some DIY mechanics may be able to handle simple repairs like replacing glow plugs, diagnosing the P037E code accurately typically requires specialized tools and knowledge. If you are not experienced with automotive diagnostics, it is advisable to seek professional help to ensure that all underlying issues are properly addressed.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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