P0353 — Ignition Coil C Primary Control Circuit
P0353 is the primary control circuit fault for ignition coil C (typically cylinder 3). Swap-test the coil exactly as with P0351 and P0352. Check for oil in the plug well. Intermittent failures often occur when the engine is hot.
Fault Overview
Failed coil, wiring open/short, connector issues, and power/ground problems are the primary causes.
Engine & Platform Coverage
Symptoms
- •P0353
- •ignition coil C circuit
- •coil primary cylinder 3
Possible Causes
- 1.Failed ignition coil C
- 2.Wiring open or short
- 3.Connector issues
- 4.Power or ground problems
Wiring & Circuit Notes
Coil C connector and control circuit.
DVOM Specs & Sensor Tests
Primary resistance. Control circuit integrity. Power and ground.
Diagnostic Flow — FSM Sequence
AI Diesel Tech enforces this evidence-gate sequence. Each gate must pass before advancing.
3 steps locked behind Technician Mode- 1Step 1 — Swap Coil C with Another Cylinder: Swap coil C with another cylinder and retest. If the code or misfire follows the coil, replace it.
- 2Step 2 — Test Control Circuit, Power, and Ground: Test the control circuit voltage, power feed, and ground at the coil connector.
- 3Step 3 — Inspect Wiring and Connector: Inspect the connector and wiring for oil intrusion, corrosion, or damage.
- 4Step 4 — Replace Coil if Confirmed Bad: Replace the coil if it fails the swap test and the circuit is proven good.
Unlock the full evidence-gated diagnostic sequence, DVOM test steps, and repair procedures in Technician Mode.
Full Diagnostic Access
Verification steps, preventative measures, severity guidance, and legacy comparison are available in Technician Mode.
Typical Repair Costs
Replace coil $40–200; repair wiring $50–200; fix oil leak $100–400.
Related Codes & Pages
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Summary
Use the AI Diesel Tech diagnostic engine to run this code through a structured, evidence-gated sequence and get a confirmed root cause before any parts are replaced.