Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the heater (glow plug) for cylinder number 7 in the engine. It's not working right, which can make it hard to start the engine, especially when it's cold.
The P06BF code indicates that the Engine Control Module (ECM) has detected an issue with the glow plug circuit for cylinder 7. The glow plug is not performing within the expected range.
Glow plugs are used in diesel engines to preheat the combustion chamber for easier starting and better combustion. The ECM monitors the glow plug circuit to ensure it operates within the specified range. If the resistance or performance of the glow plug for cylinder 7 deviates from the expected values, the ECM triggers the P06BF code.
• Difficulty starting the engine, especially in cold weather
• Engine misfires
• Rough idling
• Faulty glow plug for cylinder 7
• Wiring issues in the glow plug circuit
• Faulty glow plug control module
Glow Plug: A device used to preheat the air in a diesel engine to aid in starting.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the P06BF code.
• Inspect the wiring and connections to the glow plug for cylinder 7.
• Test the resistance of the glow plug to ensure it is within specifications.
• Replace the faulty glow plug for cylinder 7.
• Repair or replace damaged wiring in the glow plug 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
• Ram 2500
• Regularly inspect and maintain the glow plug system.
• Ensure all electrical connections are secure.
• Use quality diesel fuel to prevent carbon buildup.
Engine Performance
• Have the vehicle inspected by a qualified technician.
• Avoid prolonged engine cranking to prevent battery drain.
Glow plugs may be covered under the vehicle's powertrain warranty. Check with your manufacturer.
This code is commonly seen in diesel engines, especially in colder climates where glow plugs are essential for starting.
Moderate – It is important to address this issue to ensure reliable engine starting and performance.
Driving with a faulty glow plug can lead to starting issues and increased emissions. It is advisable to repair the issue promptly.
• Cold engine start
• Ambient temperature below 50°F
The glow plug for cylinder 7 is located on the engine block, typically near the cylinder head of the seventh cylinder.
Q: Can I drive with a P06BF code?
A: While you can drive with this code, it may be difficult to start the engine, especially in cold weather. It's best to fix it soon.
Q: How do I know if my glow plug is bad?
A: Symptoms include hard starting, rough idling, and engine misfires. A diagnostic scan can confirm the issue.
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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.