P0354
PowertrainIgnition Systemhigh severityIgnition Coil D Primary/Secondary Circuit Malfunction
What P0354 Means
The PCM detected a fault in the primary or secondary circuit of ignition coil D (cylinder 4). The coil may not be delivering proper spark, leading to a misfire.
Symptoms
- Engine misfire
- Loss of power
- Check engine light on
Common Causes
- Faulty ignition coil
- Damaged coil wiring or connector
- Poor coil ground
- Failed PCM coil driver
Diagnostic Steps
- Scan for related misfire codes
- Inspect coil D connector and wiring
- Swap coil D with another cylinder to test
- Measure coil primary/secondary resistance
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Community Confirmed Fixes
No confirmed fixes yet for this code. Be the first to contribute!
Submit a FixFound a Fix for P0354?
Help other technicians by sharing what worked on your vehicle.
Submit Your Fix