[SOLVED] P138A Code: Fixing Glow Plug Control Module Circuit Range/Performance Issue

The automobile fault code P138A indicates a problem with the Glow Plug Control Module. The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light. The cause of this fault code can be a faulty Glow Plug Control Module, an open or shorted harness, or a poor electrical connection in the module circuit.

To fix this issue, you should visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins in the connectors. The repair time for this problem is estimated to be around 1.0 hour.

It is important to address this issue promptly to prevent further damage to the vehicle.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p138a fault code.

  • The symptoms of the automobile fault code p138a include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p138a can be caused by a faulty Glow Plug Control Module, an open or shorted harness, or a poor electrical connection in the circuit.

  • The fault code P138A can be caused by the following: a faulty Glow Plug Control Module, an open or shorted harness for the Glow Plug Control Module, and a poor electrical connection in the Glow Plug Control Module circuit.

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To fix the automobile fault code p138a, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p138a, you need to follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The automobile fault code P138A can be diagnosed and fixed within an estimated repair time of 1.0 hour. Most auto repair shops typically charge between $75 and $150 per hour for this type of repair.

The P138A fault code is related to the Glow Plug Control Module in your automobile.

The Engine Control Module (ECM) is responsible for monitoring this module. When the ECM detects that the Glow Plug Control Module is not functioning correctly, it sets the P138A code in the On-Board Diagnostic II (OBDII) system.

This code specifically refers to the Glow Plug Control Module Control Circuit RangePerformance. In simpler terms, the P138A code indicates that there is an issue with the control circuit of the Glow Plug Control Module. This module is responsible for managing the glow plugs in your vehicle, which are essential for starting the engine, especially in cold weather.

When the control circuit is not operating within the expected range or is not performing as it should, it triggers the P138A fault code. If you encounter this fault code, it is important to have it addressed promptly. Ignoring the issue could lead to difficulties starting your vehicle, particularly in colder temperatures.

A qualified mechanic will be able to diagnose the exact cause of the problem and perform the necessary repairs to ensure your Glow Plug Control Module is functioning properly again.

What are the possible causes of the automobile fault code P138A?

If you see the engine light or service engine soon warning light on, the fault code P138A could be the culprit. This code is often caused by a faulty glow plug control module, an open or shorted harness, or a poor electrical connection in the glow plug control module circuit. To fix the issue, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look out for broken, bent, pushed out, or corroded pins in the connectors.

How can I visually inspect the wiring harness and connectors to fix the P138A fault code?

To fix the P138A fault code, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check if there are any broken, bent, pushed out, or corroded pins in the connectors. This can help identify if the fault lies in the faulty glow plug control module, an open or shorted harness, or a poor electrical connection. Take note of the possible causes listed above and address them accordingly.

What should I look for when checking for damaged components and connector’s pins to resolve the P138A fault code?

When resolving the P138A fault code, start by checking for damaged components and connector’s pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any signs of damage such as broken, bent, pushed out, or corroded pins. By doing this, you can identify any issues with the Glow Plug Control Module or its circuit connections. This step is crucial in resolving the fault code and ensuring the proper functioning of the engine.

p138a error fault code explained

If your engine light is on, it could be due to a faulty Glow Plug Control Module or issues with the wiring harness and connectors. To fix this, visually inspect the wiring and connectors for any damage or corrosion. Check for broken or bent pins as well.

Take action now to prevent further problems.

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