Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that the part that helps start the engine when it's really cold isn't working well for one of the engine's sections.
The P067A code indicates that the control circuit for the glow plug in cylinder 4 is experiencing a low voltage condition, which means it might not be working properly to heat up the cylinder for starting.
This code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the glow plug control circuit for cylinder 4. Glow plugs are used in diesel engines to preheat the combustion chamber, ensuring efficient starting and operation in cold conditions.
• Difficulty starting the engine in cold weather
• Engine misfire or rough idle
• Check Engine Light illuminated
• Faulty glow plug in cylinder 4
• Wiring issues or poor connections in the glow plug circuit
• Faulty glow plug control module
Glow Plug: A device used to preheat the air in a diesel engine's cylinder to aid starting.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the glow plug in cylinder 4 for damage or wear.
• Check the wiring and connections in the glow plug circuit for continuity and damage.
• Replace the faulty glow plug in cylinder 4.
• Repair or replace damaged wiring or connectors in the circuit.
• Replace the glow plug control module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-250 Super Duty
• Chevrolet Silverado 2500HD
• Dodge Ram 2500
• Regularly inspect glow plugs for wear and damage.
• Ensure all electrical connections are secure and free from corrosion.
• Perform regular maintenance checks on the glow plug control module.
Sensor Issue
• Address this issue promptly to avoid starting problems.
• Consider a professional diagnosis if unsure about electrical systems.
Check with your vehicle manufacturer for specific warranty coverage on glow plugs and related components.
Glow plug issues are common in diesel engines, especially in colder climates where they are frequently used.
Moderate – While the vehicle may still operate, starting issues can worsen if not addressed.
Driving with a malfunctioning glow plug can lead to increased emissions and potential starting failures.
• Engine cold start
• Ambient temperature below freezing
The glow plug for cylinder 4 is located in the engine's cylinder head, typically near the intake manifold.
Q: Can I drive with a P067A code?
A: Yes, but it's best to fix it soon to avoid starting issues, especially in cold weather.
Q: How do I know if my glow plug is bad?
A: Look for symptoms like hard starting, rough idling, and the check engine light being on.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.