TorqueMech OBD Code Guide
P0352 - Ignition Coil B Primary/Secondary Circuit
Ignition coil B primary or secondary circuit fault detected.
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Read code pattern
Check likely system
Estimate after confirmation
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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 B primary or secondary circuit fault detected.
Common Causes
- Failed ignition coil
- Coil wiring issue
- Poor connector fit
- PCM driver issue (rare)
Diagnostic Steps
- Swap the coil if the design allows
- Inspect the coil connector and boot
- Check for cylinder-specific misfire companions
Related OBD Codes
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Next Steps
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