Faulty ignition coil C (primary or secondary winding failure); Worn or damaged spark plug or spark plug boot; Damaged wiring or connector at the coil harness (corrosion, chafing, or loose pins); Open or short circuit in the coil primary circuit wiring; Failed ignition control module or driver circuit inside the ECM (less common); Poor engine ground connection affecting coil operation

DTC codes / P03xx · Ignition system and misfire / P0353

P0353Ignition Coil C Primary/Secondary Circuit Malfunction

Q: What does code P0353 mean?

Ignition Coil C Primary/Secondary Circuit Malfunction. P0353 indicates that the engine control module (ECM) has detected an abnormal condition in the primary or secondary circuit of ignition coil C, which is typically the coil for cylinder 3. The ECM monitors the coil's electrical circuit and sets this code when the current or voltage falls outside the expected range during operation.

P0353 indicates that the engine control module (ECM) has detected an abnormal condition in the primary or secondary circuit of ignition coil C, which is typically the coil for cylinder 3. The ECM monitors the coil's electrical circuit and sets this code when the current or voltage falls outside the expected range during operation.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Symptoms you may notice

Illuminated check engine light, often with no other noticeable symptoms
Engine misfire, especially under load or acceleration
Rough idle or shaking felt through the steering wheel and seats
Reduced engine power and poor fuel economy
Difficulty starting or stalling shortly after startup
A flashing check engine light if the misfire is severe enough to damage the catalytic converter

Common causes, most likely first

Faulty ignition coil C (primary or secondary winding failure)
Worn or damaged spark plug or spark plug boot
Damaged wiring or connector at the coil harness (corrosion, chafing, or loose pins)
Open or short circuit in the coil primary circuit wiring
Failed ignition control module or driver circuit inside the ECM (less common)
Poor engine ground connection affecting coil operation

How to diagnose and fix it

Inspect the coil connector and wiring for corrosion, loose pins, or physical damage; repair as needed
Swap ignition coil C with a known-good coil from another cylinder and see if the misfire moves (if it does, replace the coil)
Remove and inspect the spark plug for wear, fouling, or incorrect gap; replace if necessary
Check the coil primary and secondary resistance with a multimeter and compare to specifications
Perform a spark test to confirm whether the coil is firing
Test the coil driver circuit with a noid light or oscilloscope to verify the ECM is commanding the coil
If all electrical checks pass, diagnose the ECM driver circuit or replace the ECM as a last resort

Don't Replace the Coil Until You Check These

A misfire code P0353 often appears alongside P0303 (cylinder 3 misfire), but the coil may not be the culprit; a bad spark plug or injector can cause similar symptoms.
Swapping coils between cylinders is a quick and free diagnostic step that many DIYers skip, yet it reliably identifies a faulty coil without any tools.
Corroded or oil-soaked coil connectors are a common cause of P0353, especially on engines with valve cover gasket leaks, so inspect the harness before condemning the coil.
The ECM driver circuit for the coil can fail due to a shorted coil, so always check the coil's resistance before installing a new one to avoid repeat failures.
On some vehicles, a weak battery or charging system issue can cause intermittent coil circuit codes, so verify battery voltage and ground integrity first.

Can I keep driving with P0353?

You can drive cautiously to a repair shop if the check engine light is steady and the engine runs smoothly, but avoid heavy acceleration or towing. If the light is flashing or the engine misfires severely, stop driving to prevent catalytic converter damage.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.