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IgnitionCritical✅ DIY Friendly

P0354

Ignition Coil D Primary/Secondary Circuit Malfunction

Fault in ignition coil D (cylinder 4).

SeverityCritical
CategoryIgnition
Est. Repair Cost$50–$200
Code TypePowertrain
DIY RepairYes

⚡ Common Causes

  • ›Failed coil D
  • ›Wiring issue
  • ›Open primary winding

⚠️ Symptoms

  • ›Cylinder 4 misfire
  • ›Rough idle
  • ›Check engine light

✅ How to Fix — Step by Step

  • Step 1:Swap coil to confirm
  • Step 2:Replace coil
  • Step 3:Check wiring

🔧 Diagnostic Tools Required

Using the correct diagnostic tools helps identify the root cause of P0354 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: On 4-cylinder engines P0354 affects cylinder 4 — the rear cylinder, which can run hotter.

Repair Cost Estimate

Full Repair Estimate
$50–$200
DIY Possible?
YES
Severity
Critical

Frequently Asked Questions

What does OBD2 code P0354 mean?+
P0354 stands for Ignition Coil D Primary/Secondary Circuit Malfunction. Fault in ignition coil D (cylinder 4).
What causes code P0354?+
Failed coil D; Wiring issue; Open primary winding
How do I fix code P0354?+
Swap coil to confirm; Replace coil; Check wiring
How much does it cost to fix P0354?+
Estimated repair cost for P0354 is $50–$200.
Is P0354 DIY-friendly?+
Yes — P0354 is generally DIY-friendly with basic tools.

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