What does code P0354 mean and is it safe to drive?
P0354: Ignition Coil D Primary/Secondary Circuit Malfunction. Here’s what it means, what usually causes it, what repairs typically cost, and how urgent it is to keep driving.
PowertrainDrive with caution
Repair cost
$80–$300
System
Powertrain
Urgency
high
What this code means
Fault in ignition coil D circuit (cylinder 4). This is the fourth coil in a coil-on-plug system. Diagnosis mirrors P0351–P0353 but targets cylinder 4.
Common causes
- Failed ignition coil on cylinder 4
- Worn or fouled spark plug on cylinder 4
- Damaged coil wiring or connector
Symptoms
- Check Engine Light on or flashing
- Rough idle or misfire on cylinder 4
- Reduced performance
Typical fixes
- Replace ignition coil for cylinder 4
- Replace spark plug on cylinder 4
- Inspect coil connector and wiring
Repair cost range
Repairs for P0354 often fall between $80 and $300, depending on the cause and your vehicle.