Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the computer in your car is having trouble controlling the heater for the eighth cylinder. It's like when you try to turn on a heater in your room, but it doesn't work because there's a problem with the switch.
The P068F code indicates an issue with the glow plug control circuit for cylinder 8, where the voltage is higher than expected.
The glow plug control module monitors the voltage and current levels in the glow plug circuit. If it detects a voltage level that is higher than the specified range for cylinder 8, it triggers the P068F code. This could be due to an open circuit, a short to voltage, or a faulty glow plug.
• Engine hard to start
• Rough idling
• Increased emissions
• Faulty glow plug
• Open or short circuit in the glow plug wiring
• Faulty glow plug control module
Glow Plug: A device used to heat the air in a diesel engine cylinder to aid in starting.
Cylinder: A chamber in which a piston moves to compress air and fuel for combustion.
• Check the glow plug for cylinder 8 for continuity.
• Inspect the wiring and connectors for damage or corrosion.
• Test the glow plug control module for proper operation.
• Replace the faulty glow plug.
• Repair or replace damaged wiring or connectors.
• Replace the glow plug control module if necessary.
• Digital multimeter
• OBD-II scanner
• Basic hand tools
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect glow plugs and wiring.
• Use high-quality fuel to prevent carbon buildup.
• Perform regular vehicle maintenance.
Engine Performance
• Avoid prolonged idling in cold weather.
• Start the vehicle in a warm environment if possible.
Check with your vehicle manufacturer for warranty coverage on glow plugs and related components.
The P068F code has been reported in diesel engines, particularly in cold climates where glow plugs are essential for starting.
Moderate – While the vehicle may still operate, prolonged issues can lead to starting problems and increased emissions.
Driving with a faulty glow plug can lead to increased emissions and potential engine starting issues.
• Engine off and cooled down
• Battery fully charged
The glow plug for cylinder 8 is located on the engine block, typically near the cylinder head.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to starting difficulties and increased emissions, especially in cold weather.
Q: Can I drive with the P068F code?
A: You can drive, but it's recommended to fix the issue to avoid starting problems and potential engine damage.
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