P0353 Ignition Coil C Primary/Secondary Circuit Malfunction

P0353 points to an ignition coil C primary or secondary circuit malfunction. The affected coil circuit should be checked before assuming a simple tune-up issue.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace plugs alone for a primary/secondary circuit code; the circuit and coil driver path must be tested.

Symptoms of P0353

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0353

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Check coil C power, control, ground, connector terminal fit, and harness continuity under movement.
Compare coil C operation and misfire counters with other cylinders during idle and load.
Inspect spark plug condition, boot tracking, moisture, oil intrusion, and coil mounting before replacement.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.