What does code P0354 mean on a Ford and is it safe to drive?
P0354: Ignition Coil D Primary/Secondary Circuit Malfunction. Here's what it means on your Ford, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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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 for your Ford
- 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
For a Ford, repairs for P0354 often fall between $80 and $300, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Ford
Ford P0354 on 5.4L Triton and 4.6L engines is a cylinder 4 coil failure. On 3-valve Triton engines, cylinder 4 spark plug access can be tight—inspect the plug thread when replacing the coil.
Most commonly affected models
F-150 2004–2014Focus 2005–2011Explorer 2006–2014