P067A 2018 GMC Sierra Code - Cylinder 4 Glow Plug Control Circuit Low Voltage
Quick Answer
The diagnostic trouble code P067A for a 2018 GMC Sierra indicates an issue with the Glow Plug Control Circuit in Cylinder 4, specifically detecting low voltage. Common causes include Faulty glow plug in Cylinder 4, Damaged wiring or connectors in the glow plug control circuit, Malfunctioning glow plug control module. 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
- P067A 2018 GMC Sierra indicates Cylinder 4 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in Cylinder 4, Damaged wiring or connectors in the glow plug control circuit, Malfunctioning glow plug control module.
- 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 P067A 2018 GMC Sierra Description
The diagnostic trouble code P067A for a 2018 GMC Sierra indicates an issue with the Glow Plug Control Circuit in Cylinder 4, specifically detecting low voltage. Glow plugs are essential components in diesel engines, as they heat the combustion chamber to facilitate cold starts. When the control circuit for the glow plug in Cylinder 4 is experiencing low voltage, it can lead to difficulties in starting the engine, reduced performance, increased emissions, and potential long-term damage if left unresolved.
Common Causes of P067A 2018 GMC Sierra
- Faulty glow plug in Cylinder 4.
- Damaged wiring or connectors in the glow plug control circuit.
- Malfunctioning glow plug control module.
- Weak battery or charging system.
- Issues with the engine control module (ECM).
Symptoms of P067A 2018 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Reduced engine performance and acceleration.
- Increased exhaust emissions.
- Illumination of the Check Engine Light on the dashboard.
How to Fix P067A 2018 GMC Sierra
- Begin by conducting a thorough inspection of the glow plug in Cylinder 4, checking for signs of damage or wear.
- Test the wiring and connectors in the glow plug control circuit for continuity and proper voltage.
- Verify the functionality of the glow plug control module and replace if necessary.
- Test the battery and charging system to ensure they are providing sufficient power.
- If all components check out, consider diagnosing the ECM for any potential faults related to the glow plug control circuit.
Cost to Fix P067A 2018 GMC Sierra
The typical repair costs for addressing a Cylinder 4 Glow Plug Control Circuit Low Voltage issue in a 2018 GMC Sierra can range from $150 to $400, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. To obtain a more precise estimate, it is advisable to inquire about local rates before proceeding with the repair.
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