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P03552018 Model Year TelemetryCritical Severity

P0355 on 2018 Cadillac Escalade

Ignition Coil E Primary/Secondary Circuit Malfunction

Technical troubleshooting wire for fault code P0355 specifically tailored for the 2018 Cadillac Escalade. Includes wiring sensor pinouts, freeze frame PID parameters, and step-by-step diagnostic tree.

2018 Engine Control Module (ECM) Specific Calibration
Cadillac Escalade2018 Escalade
2018 Cadillac Escalade
SUV • 6.2L EcoTec3 V8 (420HP) / 3.0L Duramax Turbo-Diesel Inline-6 (460 lb-ft)
2018 Stats
Vehicle
2018 Escalade
6.2L EcoTec3 V8 (420HP) / 3.0L Duramax Turbo-Diesel Inline-6 (460 lb-ft)
ECU Subsystem
Automotive OBD-II
SAE Mode $01 & $02
Est. Repair Cost
$100 - $350
OEM Parts & DIY
Urgency Level
Critical
Tow to Shop
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Common 2018 Escalade Symptoms

  • Flashing CEL
  • Violent shuddering
  • P0305 code

Likely Root Causes on 2018 Escalade

  • Dead Cylinder 5 ignition coil
  • Wiring damage
  • PCM driver fault

Step-by-Step Fix Protocol for 2018 Cadillac Escalade

Step 1: Scan & Record Freeze Frame Data

Connect an OBD-II scanner to the DLC port under the driver dashboard. Record engine RPM, Short Term / Long Term Fuel Trim (STFT/LTFT), and engine coolant temperature at the moment P0355 set.

Step 2: Inspect Wiring Harness & Pin Voltages

Inspect the sensor connector on the 2018 Escalade engine bay. Use a multimeter to verify reference voltage (5.0V / 12.0V) and ground continuity.

Step 3: Component Replacement & PCM Reset

Replace the verified defective component using OEM or equivalent grade parts. Clear DTC P0355 and complete an EPA drive cycle to verify readiness monitors set to READY.

Recommended Parts & Testing Tools

Equipment for Diagnosing 2018 Cadillac Escalade (P0355)

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OEM Ignition Component

Direct-Fit Laser Iridium Spark Plugs (Set of 4/6)

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Pre-gapped iridium spark plugs engineered to restore smooth combustion on 2018 Cadillac Escalade.

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Ignition Service Tool

Magnetic Swivel Spark Plug Socket Set

4.8 / 5.0 (Amazon Choice)

360-degree magnetic swivel socket prevents ceramic plug cracks inside deep engine spark wells.

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BlueDriver Bluetooth Pro OBDII Scan Tool

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Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

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Full Reliability Report2018 Escalade ProblemsSafety Recalls2018 Escalade RecallsAll Generation YearsEscalade P0355 Master Hub