P0351
High SeverityIgnition Coil A Primary/Secondary Circuit
Ignition System
What Does P0351 Mean?
Coil on cylinder 1 has a circuit fault.
Common Fix
Replace ignition coil
Estimated Cost (DIY)
$20 - $80
Symptoms
- ⚠️Cylinder 1 misfire
- ⚠️Rough idle
- ⚠️Check engine light
Related Symptoms
Common Causes
How to Diagnose P0351
- 1Swap coil with another cylinder
- 2Check coil connector
- 3Measure coil resistance
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Read live data and freeze frame for P0351 to pinpoint the cause before buying parts.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0351.
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...
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A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Related Symptoms
Browse →Rough idle often traces back to ignition, air metering, vacuum leaks, or timing-related faults before it becomes a full misfire complaint.
A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.
Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0351.
Open the exact vehicle hub for a repair workflow commonly associated with P0351.
Open the exact vehicle hub for a repair workflow commonly associated with P0351.
Open the exact vehicle hub grounded by OEM manual evidence related to P0351.
Open the exact vehicle hub grounded by OEM manual evidence related to P0351.
Open the exact vehicle hub grounded by OEM manual evidence related to P0351.
Exact Repair Workflows
Browse →Open the exact repair flow most commonly associated with P0351 on this vehicle.
Open the exact repair flow most commonly associated with P0351 on this vehicle.
Open the exact repair flow most commonly associated with P0351 on this vehicle.
Open the exact repair flow most commonly associated with P0351 on this vehicle.
Open the exact repair flow most commonly associated with P0351 on this vehicle.
Open the exact repair flow most commonly associated with P0351 on this vehicle.
Related Codes
Cylinder 1 is misfiring — not firing properly. Could be spark plug, coil, injector, or compression issue on that specific cylinder.
Coil on cylinder 2 has a circuit 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
- How do I test an ignition coil?
- Swap it with another cylinder. If the misfire moves, the coil is bad.
- Can a bad spark plug kill a coil?
- Yes — a worn plug with too wide a gap forces the coil to work harder, shortening its life.
Related Repair Guides
If your vehicle has triggered P0351, these DIY repair guides may help: