P1376

Code

LAND ROVER P — Powertrain

Cylinder of ignition coil activation failure 6

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 18 EN: 39 RU: 19

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Page language: EN

Causes

Faulty ignition coil for cylinder 6
Damaged wiring or poor connector at the coil (open/short/intermittent)
Missing or low power supply to the coil (fuse, relay, battery/charging issue)
Poor ground at engine harness or coil mounting
Faulty ECM/ignition driver transistor driving the coil
Intermittent CAN/ECM communications or software glitch

Symptoms

Malfunction indicator lamp (MIL) / Check Engine light on
Rough idle or engine vibration, especially at idle
Reduced engine power or hesitation under load
Poor fuel economy and possible increased emissions
Stored misfire counters for cylinder 6 (P0306 may also be present)

What to check

Retrieve freeze frame and live data; note engine rpm, coolant temp, and misfire counts
Check for related codes (e.g., misfire codes such as P0306)
Visually inspect coil, connector and wiring at cylinder 6 for damage, corrosion or oil contamination
Verify battery voltage and charging system (should be ~11–15 V during cranking and running)
Check fuses/relays that supply ignition coils
Swap coil 6 with another cylinder's coil (if coils are identical) to see if code follows the coil

Signal parameters

Battery supply voltage: typically ~11–15 V (while cranking/running)
Ignition coil primary resistance: typical range ~0.4–2.0 Ω (manufacturer spec required)
Ignition coil secondary resistance: typical range ~5–20 kΩ (manufacturer spec required)
Coil driver pulse width / dwell: varies with RPM — expect pulsed switching correlated with crankshaft position
Coil primary waveform: clean switching pulses with expected amplitude and return; no missing pulses on cylinder 6
Misfire counter for cylinder 6 should be checked in live data

Diagnostic algorithm

Read and record all DTCs and freeze frame data. Note whether P0306 (cylinder 6 misfire) is also present.
Perform a visual inspection of coil, connector and wiring for cylinder 6. Repair obvious damage or corrosion.
Swap the ignition coil from cylinder 6 with a known good coil on another cylinder. Clear codes and run engine. If the fault moves to the other cylinder, replace the coil.
Check power and ground at the coil connector with a DVOM or scope. Verify constant battery supply and a solid ground reference while cranking/running.
Measure coil primary and secondary resistances and compare to Land Rover specifications. Replace coil if out of spec.
Back-probe the coil primary with an oscilloscope to verify the ECM is commanding pulses. Confirm pulse timing correlates with crankshaft position and that pulses are present for other cylinders.
If no command pulse is present but wiring and coil are good, check wiring continuity from the coil connector to the ECM and inspect the ECM connector for damage.
If wiring and coil are good and no external fault is found, consider ECM driver failure — consult manufacturer service information before replacing ECM (perform guided tests or module bench testing where applicable).
After repair, clear codes and perform a road/test drive to confirm the fault does not return and misfire counters are normal.

Likely causes

Damaged coil harness connector or corroded pin at cylinder 6
Defective ignition coil on cylinder 6
Open/short in coil primary circuit (power/ground/driver)
Faulty ECM coil driver (less common)

Fault status

⚠️ Status

P1376 — Cylinder 6 ignition coil activation failure detected. Check coil, wiring, power/ground and ECM driver for cylinder 6.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

Repair manuals

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P1376 — Cylinder of ignition coil activation failure 6