P0355

Code

LAND ROVER P — Powertrain

Malfunction of the primary/secondary circuit ignition coil E

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 22 EN: 45 RU: 29

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Page language: EN

Causes

Failed ignition coil (coil E)
Open or shorted wiring in coil E primary (control) or secondary (high-voltage) circuits
Poor connector contact, corrosion or damaged pin at the coil harness
Faulty coil driver / ignition module inside the ECM
Damaged or fouled spark plug or plug boot causing secondary leakage
Water/contaminant ingress or thermal damage to coil

Symptoms

Check Engine light (MIL) on
Engine misfire on the cylinder served by coil E (rough idle)
Reduced power or hesitation under load
Poor fuel economy and increased emissions
Hard starting or no-start (in severe cases)
Possible audible popping or uneven exhaust note

What to check

Read freeze frame and live data — confirm P0355 and note engine conditions when set
Check for related codes (misfire codes P030x, other P035x codes) that may point to coil swap tests
Visual inspection of coil E, connector, wiring harness, and spark plug/boot
Wiggle test wiring and connector while monitoring live misfire/circuit status for intermittent behavior
Swap coil E with a known-good coil (from another cylinder) and see if code follows the coil
Measure coil primary and secondary resistances and compare with manufacturer specifications

Signal parameters

Primary coil resistance: typically ~0.2–2.0 ohms (vehicle-specific — consult service manual)
Secondary coil resistance: typically ~5k–20k ohms (vehicle-specific)
Supply voltage to coil connector: near battery voltage (~11–14 V) with ignition ON/cranking
Driver switching: low-side transistor that pulls primary to ground — primary waveform is a pulsed square/triangular current waveform
Dwell/ON time and pulse frequency vary with RPM and load — expect pulses during cranking and running
Absence of primary switching pulses, stuck-on/shorted primary, or abnormal waveform amplitude/shape indicates a fault

Diagnostic algorithm

Connect a diagnostic scanner and confirm P0355. Record freeze-frame and any accompanying P030x misfire codes.
Perform a visual inspection: coil E, connector, wiring, and spark plug/boot for damage, corrosion, oil or water contamination.
With ignition OFF, unplug coil E connector and inspect terminals for corrosion, bent pins, or pushed-out pins.
Swap coil E with a coil from another cylinder. Clear codes and run the engine. If the code/misfire follows the coil, replace the coil.
If the code remains on the original cylinder, inspect wiring between coil and ECM: check for continuity and shorts to battery and ground. Repair any damaged wiring.
Measure coil primary resistance (with coil unplugged) and compare to spec. Also measure secondary resistance between coil high-voltage output and primary circuit return. Replace coil if out of spec.
With a lab scope or appropriate low-voltage test probe, check the primary drive waveform at the coil connector while cranking/running. Look for proper switching pulses. Absence or abnormal waveform suggests driver/ECM issue.
Verify coil supply voltage (battery feed) and chassis/engine ground integrity at the coil connector.
If wiring and coil are good but no primary drive is present or waveform is abnormal, test the ECM/ignition module driver output per manufacturer procedure (consult service manual).
After repairs, clear codes and road-test to confirm the fault is resolved and no misfires recur.

Likely causes

Defective coil E (most common)
Loose/corroded connector at coil E
Open/short in coil E primary feed or return (ECM drive)
Failed ECM ignition driver transistor for coil E
High secondary resistance from damaged coil or plug boot causing no spark
Intermittent fault from heat cycling or vibration

Fault status

⚠️ Status

P0355 — Ignition Coil 'E' Primary/Secondary Circuit Malfunction. ECM detected abnormal open/short/high resistance or missing/abnormal drive waveform on coil E circuit; MIL set.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P0355 — Malfunction of the primary/secondary circuit ignition coil E