P0356
High SeverityIgnition Coil F Primary/Secondary Circuit
Ignition System
What Does P0356 Mean?
Coil on cylinder 6 fault.
Common Fix
Replace ignition coil
Estimated Cost (DIY)
$20 - $80
Symptoms
- ⚠️Cylinder 6 misfire
Common Causes
How to Diagnose P0356
- 1Swap coil
- 2Replace
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Read live data and freeze frame for P0356 to pinpoint the cause before buying parts.
Ready to fix it yourself?
Find My Vehicle Repair Guide →Select your exact vehicle for a personalized step-by-step guide
Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0356.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0356.
Open the exact vehicle hub for a repair workflow commonly associated with P0356.
Open the exact vehicle hub for a repair workflow commonly associated with P0356.
Open the exact vehicle hub grounded by OEM manual evidence related to P0356.
Open the exact vehicle hub grounded by OEM manual evidence related to P0356.
Open the exact vehicle hub grounded by OEM manual evidence related to P0356.
Exact Repair Workflows
Browse →Open the exact repair flow most commonly associated with P0356 on this vehicle.
Open the exact repair flow most commonly associated with P0356 on this vehicle.
Open the exact repair flow most commonly associated with P0356 on this vehicle.
Open the exact repair flow most commonly associated with P0356 on this vehicle.
Open the exact repair flow most commonly associated with P0356 on this vehicle.
Open the exact repair flow most commonly associated with P0356 on this vehicle.
Related Codes
Cylinder 6 is misfiring. Only on 6+ cylinder engines.
Coil on cylinder 5 fault.
The engine is misfiring across multiple cylinders. This is often caused by something that affects all cylinders — spark plugs, fuel quality, vacuum leak, or low compression.
Frequently Asked Questions
- Can a misfire damage the catalytic converter?
- Yes — unburned fuel from a misfire enters the cat and can overheat it, causing permanent damage.
- How urgent is a coil replacement?
- Fix within a week. A flashing check engine light means the cat is actively being damaged.
Related Repair Guides
If your vehicle has triggered P0356, these DIY repair guides may help: