OBD-II code · Powertrain (generic)
P0354 Ignition Coil "D" Primary/Secondary Circuit Malfunction (Cylinder 4)
An electrical fault has been detected in the ignition coil circuit for cylinder 4 — open primary winding, short to ground, or short to supply. The ECU disables the coil to protect its driver and the cylinder misfires.
Is it safe to drive with P0354?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyCoil primary winding open or shorted
- PossibleWiring or connector fault
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Ignition Coil, Ignition Coil Wiring
Related codes
- P0304Cylinder 4 Misfire Detected
- P0351Ignition Coil "A" Primary/Secondary Circuit Malfunction (Cylinder 1)
- P0352Ignition Coil "B" Primary/Secondary Circuit Malfunction (Cylinder 2)
- P0353Ignition Coil "C" Primary/Secondary Circuit Malfunction (Cylinder 3)
- P0355Ignition Coil "E" Primary/Secondary Circuit
- P0356Ignition Coil "F" Primary/Secondary Circuit
- P0357Ignition Coil "G" Primary/Secondary Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.