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Engine-Codes – Generic – P067D

P067D Code - Cylinder 5 Glow Plug Control Circuit High Voltage

Quick Answer

The P067D diagnostic trouble code (DTC) indicates a high voltage condition in the glow plug control circuit for cylinder 5. Common causes include Faulty glow plug for cylinder 5, Defective glow plug relay or control module, Wiring issues, such as shorts or opens in the glow plug circuit. 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
P067D indicates Cylinder 5 Glow Plug Control Circuit High Voltage.
Common causes
Common causes include Faulty glow plug for cylinder 5, Defective glow plug relay or control module, Wiring issues, such as shorts or opens in the glow plug circuit.
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 17, 2024
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Code P067D Description

The P067D diagnostic trouble code (DTC) indicates a high voltage condition in the glow plug control circuit for cylinder 5. Glow plugs are crucial components in diesel engines, designed to preheat the combustion chamber for improved ignition during cold starts. When the Engine Control Module (ECM) detects a voltage level that exceeds the expected range for the glow plug circuit, it triggers this code.

OBDII Code P067D - Cylinder 5 Glow Plug Control Circuit High Voltage
P067D Code - Cylinder 5 Glow Plug Control Circuit High Voltage

Common Causes of P067D

  1. Faulty glow plug for cylinder 5.
  2. Defective glow plug relay or control module.
  3. Wiring issues, such as shorts or opens in the glow plug circuit.
  4. Corrosion or damage to the electrical connectors associated with the glow plug.
  5. Malfunctioning Engine Control Module (ECM) or software issues.

Symptoms of P067D

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or misfiring of the engine.
  3. Increased exhaust smoke, particularly during startup.
  4. Decreased fuel efficiency and overall engine performance.
  5. Activation of the check engine light on the dashboard.

How to Fix P067D

  1. Diagnostic Testing: Begin with a thorough diagnostic scan to confirm the P067D code and check for any related codes. This will help identify if the issue is isolated to cylinder 5 or if there are broader system problems.
  2. Visual Inspection: Inspect the wiring harness and connectors associated with the glow plug for signs of damage, corrosion, or loose connections. Repair or replace any damaged components as necessary.
  3. Test Glow Plug and Relay: Use a multimeter to test the resistance of the glow plug for cylinder 5. If it shows an open circuit or significantly higher resistance than specified, replace the glow plug. Also, test the glow plug relay to ensure it is functioning correctly.
  4. ECM Check: If the glow plug and relay are functioning correctly, check the ECM for faults or software updates. Reprogramming or replacing the ECM may be necessary if it is determined to be the source of the issue.
  5. Clear Codes and Test Drive: After repairs, clear the diagnostic codes and take the vehicle for a test drive to ensure the issue has been resolved and that the check engine light does not reappear.

Cost to Fix P067D

The cost to repair a P067D code can vary widely based on the specific cause of the issue and the vehicle's make and model. On average, the total repair cost may range from $150 to $600. This estimate includes parts such as glow plugs (typically $20-$100 each), relays ($10-$50), and labor costs. Labor rates generally range from $80 to $150 per hour, depending on the shop's location and reputation. In metropolitan areas or at dealerships, rates may be higher, while independent shops often offer more competitive pricing. It is advisable to consult local repair shops for a more precise estimate based on your specific vehicle and situation.

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Code P067D Information for Specific Makes

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.

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