TorqueMech OBD Code Guide
P0350 - Ignition Coil Primary/Secondary Circuit
Ignition coil primary/secondary circuit fault detected.
Code first. Confirm symptoms and checks before pricing parts.
Read code pattern
Check likely system
Estimate after confirmation
Explore Related Systems
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Common Next Steps
Turn the code into the next check.
Inspect ignition coils
Check coil boots, carbon tracking, and whether the miss follows a swap.
Check spark plugs
Inspect gap, fouling, wear, oil, coolant, and plug-well condition.
Verify injector operation
Move to injector balance, pulse, or leak-down checks if the misfire stays.
Check compression if needed
Use compression or leak-down testing when spark and fuel checks do not move the fault.
Code Overview
Ignition coil primary/secondary circuit fault detected.
Common Causes
- Component failure
- Wiring/connectors issue
- System condition causing fault
Diagnostic Steps
- Check for related codes and freeze-frame data
- Inspect wiring/connectors for damage/corrosion
- Verify sensor readings on a scan tool if available
- Clear code and road test to confirm fix
Related OBD Codes
Browse nearby codes when systems overlap.
Next Steps
Move from code to checks, then estimate.