Ignition

P0353 — Ignition Coil C Primary/Secondary Circuit Malfunction (Cylinder 3)

Severity: medium Drive with care, to a shop

What P0353 means

The PCM fires ignition coil C, normally on cylinder 3, by switching current through the coil's primary winding with an internal driver. If the circuit's electrical behavior doesn't match what the PCM expects, it sets P0353. The cause can be the coil itself, wiring that is open or shorted, a poor connector, or a failed driver inside the PCM.

Symptoms

  • Check Engine light on or flashing
  • Misfire on cylinder 3
  • Rough idle
  • Hesitation or shaking under acceleration
  • Loss of power and worse fuel economy
  • Hard starting

Possible causes

  1. Failed ignition coil C
  2. Open or shorted wiring to the coil
  3. Corroded or loose coil connector
  4. Faulty coil driver inside the PCM
  5. Worn spark plug or other secondary ignition fault
  6. Missing power or ground at the coil

How to diagnose

  1. Scan for codes and freeze-frame data, and look for misfire codes such as P0303
  2. Inspect the coil, connector and harness for heat damage, cracks, corrosion or chafing
  3. Swap coil C with a neighboring coil and see whether the fault or misfire follows it
  4. Inspect the cylinder 3 spark plug for gap, wear, fouling and cracked porcelain
  5. Measure coil winding resistance and compare with the factory spec
  6. Check power, ground and the PCM control signal at the coil connector
  7. Test the control wire from the PCM to the coil for opens and shorts
  8. If wiring and coil are good, suspect the PCM driver

Common fixes

  • Replace ignition coil C
  • Replace the spark plug, ideally as a set
  • Repair damaged wiring or replace the connector
  • Clean the terminals and make sure the connector seats firmly
  • Repair or replace the PCM if the driver has failed

P0353 on different brands

Ford · manuals
Ford uses an extended P0353:11 format on recent gasoline engines, indicating a short to ground in the coil control circuit; it describes the condition the monitor saw, not a confirmed failed part.

Questions and answers

What does P0353 mean?

It is a fault in the control circuit of ignition coil C, usually on cylinder 3. The PCM saw an abnormal electrical signal in the primary or secondary side.

Can I drive with P0353?

Only briefly and gently, for example to a shop. Misfires harm the catalytic converter, and if the check engine light flashes you should stop driving.

Is replacing the coil enough?

Often, but check the connector, wiring and spark plug first. If one of those is the real cause, a new coil may fail quickly too.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.