Faulty ignition coil C (internal primary winding or driver fault); Damaged, corroded or loose connector at the coil, or a poor terminal fit; Open circuit, chafed or shorted wiring between the coil and the control unit, or in the power or earth supply to the coil; Blown fuse or faulty relay feeding the ignition coil supply; Worn spark plug or wrong plug gap putting extra strain on the coil; Fault in the engine control unit output driver.

P0353

Ignition Coil C Primary Control Circuit/Open.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
3: AreaIgnition system or misfire
53: FaultThe specific fault in that area

What it means

P0353 means the engine control unit has detected a fault in the primary control circuit of ignition coil C, which is usually the third coil in the firing order or the third cylinder, depending on the manufacturer's labelling. The control unit monitors the coil driver or the feedback signal and found it open circuit or out of the expected range, so the coil may not be firing properly.

Symptoms

Engine misfire, especially under load or acceleration
Rough or unstable idle
Engine management light on, possibly flashing during a severe misfire
Hesitation, poor power or reduced performance
Hard starting or intermittent stalling
Increased fuel consumption

Possible causes

Faulty ignition coil C (internal primary winding or driver fault)likely
Damaged, corroded or loose connector at the coil, or a poor terminal fitlikely
Open circuit, chafed or shorted wiring between the coil and the control unit, or in the power or earth supply to the coilpossible
Blown fuse or faulty relay feeding the ignition coil supplypossible
Worn spark plug or wrong plug gap putting extra strain on the coilpossible
Fault in the engine control unit output driverrare

How to diagnose

Read all stored and pending codes and the freeze frame data to see engine load, speed and temperature when the fault set, and check for related misfire codes
Identify which cylinder coil C refers to on this engine using the manufacturer's information, as the labelling varies by model
Visually inspect the coil connector, terminals and wiring for damage, heat, water ingress or corrosion
Check the fuses and relay feeding the ignition coils and confirm the supply and earth at the coil connector with a multimeter
Swap coil C with a coil from another cylinder, clear the code and see whether the fault and any misfire follows the coil
Check the control wire between the coil and the control unit for continuity and for shorts to earth or supply, following the wiring diagram for the vehicle
Inspect the spark plug for that cylinder for wear, fouling or incorrect gap
Use live data or an oscilloscope to confirm the control signal reaches the coil if the wiring and coil test fine

How to fix

Replace ignition coil C if it fails the swap test or the electrical checks
Repair or replace the damaged connector, terminals or wiring section
Replace the blown fuse or faulty relay after finding out why it failed
Fit new spark plugs of the correct type and gap, ideally as a full set
Replace or repair the engine control unit only after all wiring and coil faults are ruled out

Can I keep driving?

Medium severity

The car can usually be driven short distances to get it checked, but avoid heavy loads and long journeys. Unburnt fuel from a persistent misfire can overheat and damage the catalytic converter, and if the warning light flashes you should reduce power and stop driving as soon as it is safe.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.