P0351 fault code: what it means

P0351: Ignition coil A (usually cylinder 1) primary or secondary circuit fault; that cylinder will often misfire.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

failed ignition coil
worn spark plug with a wide gap
oil in the plug well or corroded coil connector
damaged coil wiring

P0351 by make

Ford

Ignition coil A (cylinder 1) circuit fault. On Falcon six-cylinders the coil packs are a known wear item.

Usual causes: failed ignition coil; coil wiring or plug; worn spark plug

Kia

Ignition coil A (cylinder 1) primary/secondary circuit fault.

Usual causes: failed coil pack; coil connector or wiring fault; worn spark plug overloading the coil

What the repair usually costs

Coil packs and spark plugs (4-cylinder)NZ$280–NZ$1,000 · A$260–A$920
Coil packs and spark plugs (V6 / V8)NZ$490–NZ$1,780 · A$480–A$1,710
Spark plugs (European turbo petrol)NZ$210–NZ$550 · A$200–A$520

Not sure what P0351 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.