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 little heater in cylinder 7 isn't working right. This heater helps the engine start when it's cold.
The glow plug in cylinder 7 is not functioning correctly, which can affect the engine's ability to start, especially in cold conditions.
The P06CB code indicates that the Engine Control Module (ECM) has detected an issue with the glow plug circuit in cylinder 7. This could be due to an electrical fault, a failed glow plug, or a problem with the wiring or connectors.
• Difficulty starting the engine
• Rough idle
• Increased exhaust smoke during startup
• Faulty glow plug
• Damaged wiring or connectors
• Faulty glow plug control module
Glow Plug: A device used to heat the air in a diesel engine cylinder to aid in starting.
ECM: Engine Control Module, the computer that controls engine functions.
• Check for any other related codes and address those first.
• Inspect the glow plug and its wiring for damage.
• Test the glow plug for proper resistance.
• Replace the faulty glow plug.
• Repair or replace damaged wiring or connectors.
• Replace the glow plug control module if necessary.
• Multimeter
• Socket set
• Torque wrench
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly inspect glow plugs and wiring.
• Use high-quality fuel to prevent deposits.
• Perform regular engine maintenance.
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving in extremely cold conditions until repaired.
Glow plugs may be covered under the powertrain warranty. Check with your vehicle manufacturer.
Glow plug issues are common in diesel engines, especially in colder climates. Regular maintenance can prevent many related problems.
Moderate – It should be addressed soon to prevent starting issues, especially in cold weather.
Driving with a malfunctioning glow plug can lead to increased emissions and potential starting issues.
• Engine cold start
• Ambient temperature below 50°F
The glow plug for cylinder 7 is located on the engine block, typically on the driver's side towards the rear.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to difficulty starting the engine, especially in cold weather, and may cause increased emissions.
Q: Can I drive my car with this code?
A: You can drive your car, but it's advisable to fix the issue soon to avoid starting problems.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.