P0354
High SeverityIgnition Coil D Primary/Secondary Circuit
Ignition System
P0354 — Instant Answer
Ignition Coil D Primary/Secondary Circuit
Severity: HIGH SEVERITY
Meaning: Coil on cylinder 4 fault.
Safe to drive? NO if CEL is flashing. YES with caution if solid, but repair this week.
Estimated repair cost: $20 - $80
Most common causes:
- 1. Failed coil (35-45% of cases)
- 2. Wiring (10-25% of cases)
Common Causes
How to Diagnose P0354
- 1Swap coil
- 2Check wiring
- 3Replace
OEM Procedures for P0354
P0354 affects the Ignition Coil. Found 34 OEM service manual procedures.
Ignition Coil
Ignition Coil & ICM Replacement (HVS) - Installation
Ignition Coil & ICM Replacement (HVS) - Installation
Ignition Coil & ICM Replacement (HVS) - Installation
Ignition Coil & ICM Replacement (HVS) - Installation
Ignition Coil & ICM Replacement (HVS) - Installation
Ignition Coil & ICM Replacement (HVS) - Installation
Ignition Coil & ICM Replacement (HVS) - Installation
Showing 8 of 34 procedures
OEM Diagnostic Flowchart
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Parts & Tools for This Job
Common parts shoppers buy for P0354 Ignition Coil D Primary/Secondary Circuit.
Oxygen Sensor
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Spark Plugs
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Ignition Coils
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Mass Air Flow Sensor
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Fuel Injectors
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Engine Oil
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OBD2 scanner
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Check SpecificationsBattery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Check SpecificationsMultimeter kit
Confirm voltage, continuity, and sensor power with one simple kit.
A meter is the cheapest way to rule out a bad circuit fast.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0354.
OEM Manual Evidence
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Related Symptoms
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Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0354 on this vehicle.
Open the exact repair flow most commonly associated with P0354 on this vehicle.
Open the exact repair flow most commonly associated with P0354 on this vehicle.
Open the exact repair flow most commonly associated with P0354 on this vehicle.
Related Codes
Frequently Asked Questions
- What causes coils to fail early?
- Running with worn spark plugs, heat soak from exhaust, and oil leaks onto coil boots.
- Can oil on a coil cause misfires?
- Yes — oil from a leaking valve cover gasket can deteriorate the coil boot insulation.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-29