P0351

Q: What does OBD2 code P0351 mean?

P0351 means: Ignition Coil A Primary/Secondary Circuit Malfunction. Fault in ignition coil A circuit. Coil A is typically cylinder 1.

Ignition Coil A Primary/Secondary Circuit Malfunction

Fault in ignition coil A circuit. Coil A is typically cylinder 1.

SeverityCritical

CategoryIgnition

Est. Repair Cost$50–$200

Code TypePowertrain

DIY RepairYes

⚡ Common Causes

›Failed ignition coil
›Open or shorted coil winding
›Wiring fault to coil
›Faulty ECM driver

⚠️ Symptoms

›Misfire on cylinder 1
›Rough idle
›Check engine light
›Hard start

✅ How to Fix — Step by Step

Step 1:Swap ignition coil to another cylinder
Step 2:Check coil resistance (primary: 0.5–2 ohms, secondary: 6,000–15,000 ohms)
Step 3:Check wiring to coil
Step 4:Replace ignition coil

💡 Pro Tip: Swap the coil to a different cylinder — if the misfire moves, the coil is bad.

Repair Cost Estimate

Full Repair Estimate

$50–$200

DIY Possible?

YES

Severity

Critical

Frequently Asked Questions

What does OBD2 code P0351 mean?+

P0351 stands for Ignition Coil A Primary/Secondary Circuit Malfunction. Fault in ignition coil A circuit. Coil A is typically cylinder 1.

What causes code P0351?+

Failed ignition coil; Open or shorted coil winding; Wiring fault to coil; Faulty ECM driver

How do I fix code P0351?+

Swap ignition coil to another cylinder; Check coil resistance (primary: 0.5–2 ohms, secondary: 6,000–15,000 ohms); Check wiring to coil; Replace ignition coil

How much does it cost to fix P0351?+

Estimated repair cost for P0351 is $50–$200.

Is P0351 DIY-friendly?+

Yes — P0351 is generally DIY-friendly with basic tools.