P06D1

Code

LAND ROVER P — Powertrain

Ignition coil of the module internal control - Performance of the control module

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 19 EN: 29 RU: 15

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Page language: EN

Causes

Faulty ignition coil or coil-on-plug module
Faulty ignition coil driver or internal control circuitry in the engine control module (ECM/PCM)
Intermittent or corroded connector(s) at coil or module
Wiring harness damage (short to power/ground or high resistance) between ECM and ignition coil
Low battery/poor charging system affecting coil drive voltage
Related sensor faults (crank/cam position) causing mis-timed coil commands

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Intermittent or consistent engine misfire(s) — rough idle, hesitation or stumble
Loss of power or poor acceleration
Hard starting or extended cranking
Reduced fuel economy
Multiple misfire-related trouble codes may be present (P0300-series)

What to check

Read all stored and pending codes and capture freeze-frame data with a capable scanner
Note which cylinder(s) are affected and any associated misfire codes (P0301–P0308)
Visual inspection of coil connectors, wiring harness, and ECM connectors for damage, corrosion or water intrusion
Check battery voltage and charging system under load
With key on/engine off, probe coil connector for battery feed and ground presence
Measure coil primary and secondary resistance and compare to typical specification

Signal parameters

Typical coil primary resistance (varies by design): ~0.3–2.0 ohm (many COP coils) — refer to OEM spec
Typical coil secondary resistance: ~3k–15k ohm (design-dependent)
Primary drive: pulsed battery voltage (0–12 V) with dwell time in milliseconds; waveform should show clean switching edges on scope
Expected command behavior: coil driver should switch to ground (or to supply depending on architecture) synchronized with crank/cam signals
Crankshaft/cam sensor signals: proper amplitude and timing relative to coil command

Diagnostic algorithm

Verify the code and related codes with a scan tool; record freeze-frame and misfire counts.
Inspect wiring, connectors and coil boots for obvious damage, corrosion or moisture. Repair any damaged wiring/connectors.
Check battery and charging system; ensure proper supply voltage (at least 12 V) while cranking and under load.
With ignition off, measure coil primary and secondary resistances and compare to OEM values. Replace coils that are out of spec.
With a DVOM and back-probing (or an oscilloscope for best results), verify coil supply voltage and switching ground signal while cranking/running. Look for voltage drops, intermittent switching, or abnormal duty cycles.
Perform a wiggle test on harness/connectors while monitoring coil command and misfire counts to detect intermittent faults.
If coil and wiring check good, use an oscilloscope to compare primary drive waveforms and secondary spark pattern between a known-good cylinder and the suspect cylinder.
Swap the suspect coil with a known-good coil (if practical) to see if the code/misfire follows the coil. If it follows the coil, replace the coil.
If the problem follows the wiring or remains on the same cylinder after coil swap, suspect ECM driver, wiring repair or connector repair.
Check for ECM software updates/TSBs; if ECM internal driver is confirmed faulty, replacement and reprogramming of the module may be required.
After repairs, clear codes and test drive to confirm the fault does not return.

Likely causes

Degraded or failing coil(s)/coil pack
Poor ground or power supply to the coil driver circuit
Damaged wiring or connector to coil(s) causing high resistance or intermittent contact
Internal failure in the ECM ignition driver stage
ECM requires software update or reflash

Fault status

⚠️ Status

Control module detected ignition coil driver performance outside expected parameters and stored a performance fault (P06D1). MIL may be illuminated. Fault may be stored as pending before becoming a confirmed/current code depending on conditions.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1.0 - 3.5 hours

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P06D1 — Ignition coil of the module internal control - Performance of the control module