P067D 2015 GMC Sierra Code - Cylinder 5 Glow Plug Control Circuit High Voltage
Quick Answer
The P067D code indicates a problem with the glow plug control circuit for cylinder 5 in a 2015 GMC Sierra. Common causes include Faulty glow plug for cylinder 5, which may be shorted or open, Damaged or corroded wiring or connectors in the glow plug circuit, Malfunctioning engine control module (ECM) that fails to regulate voltage properly. 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 2015 GMC Sierra indicates Cylinder 5 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug for cylinder 5, which may be shorted or open, Damaged or corroded wiring or connectors in the glow plug circuit, Malfunctioning engine control module (ECM) that fails to regulate voltage properly.
- 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 P067D 2015 GMC Sierra Description
The P067D code indicates a problem with the glow plug control circuit for cylinder 5 in a 2015 GMC Sierra. Glow plugs are essential components in diesel engines, designed to preheat the combustion chamber to facilitate easier starting, especially in cold weather. When the engine control module (ECM) detects a high voltage condition in the glow plug circuit for cylinder 5, it triggers this diagnostic trouble code (DTC).
Common Causes of P067D 2015 GMC Sierra
- Faulty glow plug for cylinder 5, which may be shorted or open.
- Damaged or corroded wiring or connectors in the glow plug circuit.
- Malfunctioning engine control module (ECM) that fails to regulate voltage properly.
- Poor electrical connections due to moisture or corrosion.
- Issues with the glow plug relay that may cause excessive voltage to be sent to the glow plug.
Symptoms of P067D 2015 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or misfiring during engine operation.
- Increased exhaust smoke, particularly during startup.
- Illuminated check engine light on the dashboard.
- Decreased fuel efficiency and overall engine performance.
How to Fix P067D 2015 GMC Sierra
- Diagnostic Testing: Begin with a thorough diagnostic test using an OBD-II scanner to confirm the P067D code and check for any additional codes that may indicate related issues.
- Visual Inspection: Inspect the wiring and connectors associated with the glow plug circuit for signs of damage, corrosion, or loose connections.
- Glow Plug Replacement: If the glow plug is found to be faulty, replace it with a new one, ensuring that the correct specifications are met for the GMC Sierra.
- Wiring Repair: If damaged wiring or connectors are identified, repair or replace them to restore proper electrical flow to the glow plug circuit.
- ECM Check: If the issue persists, test the ECM for proper function and voltage regulation. Reprogramming or replacing the ECM may be necessary if it is found to be faulty.
Cost to Fix P067D 2015 GMC Sierra
The cost to repair a P067D code can vary widely based on several factors, including the specific diagnosis, parts required, and labor rates in your area. Generally, the total cost for parts and labor can range from $150 to $600. Glow plugs typically cost between $20 and $100 each, while labor rates can vary significantly. Most auto repair shops charge between $80 and $150 per hour; however, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower rates. It is advisable to check local rates for a more precise estimate and to obtain quotes from multiple repair shops to ensure a fair price.
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Frequently Asked Questions about P067D 2015 GMC Sierra Code
1. What does OBDII code P067D mean on a 2015 GMC Sierra?
P067D indicates a high voltage issue in the glow plug control circuit for cylinder 5, which is responsible for aiding cold starts in diesel engines.
2. What are the symptoms of code P067D on a 2015 GMC Sierra?
Symptoms may include difficulty starting in cold weather, a rough idle, reduced fuel efficiency, and the Check Engine Light turning on.
3. What causes code P067D to appear on a 2015 GMC Sierra?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or corrosion in the electrical connections.
4. How can I diagnose code P067D on my 2015 GMC Sierra?
Diagnose the issue by inspecting the glow plug for cylinder 5, checking the related wiring and connectors for damage or corrosion, and testing the glow plug control module's voltage output.
5. Can I drive my 2015 GMC Sierra with code P067D active?
While the truck may still run, driving with this code can lead to hard starts in cold weather and potential damage to the engine or electrical system if not addressed.
6. How do I fix code P067D on a 2015 GMC Sierra?
Repairs typically involve replacing the faulty glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if it’s defective.
7. How much does it cost to fix code P067D on a 2015 GMC Sierra?
Repair costs can vary but generally range from $100 to $300, depending on whether only the glow plug is replaced or additional components like the control module or wiring require repair.
8. Can a bad glow plug cause other issues on my 2015 GMC Sierra?
Yes, a bad glow plug can lead to poor engine performance, increased emissions, and difficulty starting the vehicle, especially in colder conditions.
9. How can I prevent code P067D from recurring on my 2015 GMC Sierra?
Regular maintenance, including inspecting the glow plugs, wiring, and connectors for wear or corrosion, can help prevent this code from recurring.
10. Will resetting the Check Engine Light fix code P067D on my 2015 GMC Sierra?
Resetting the light will not fix the underlying issue. The cause of the high voltage in the glow plug control circuit must be diagnosed and repaired to resolve the code fully.
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