Flickering Check Engine Light and Rough Idle on Range Rover Evoque II — What It Really Means

Let's start with what that flickering light is telling you

On your Range Rover Evoque II, the check engine light behaves in two very different ways, and the difference matters a lot. If it comes on and stays on, the engine computer has logged a fault — annoying, but usually not an emergency. If it flashes or flickers, the ECU is telling you a misfire is happening right now, and unburned fuel is being pushed into the catalytic converter. That's the scenario that can cook a cat in a matter of minutes, so a flashing light deserves respect. The rough idle you're feeling is the misfire you're seeing on the dash — the two symptoms are the same story. On the Ingenium 2.0-litre petrol (and the 48V mild-hybrid versions), a lumpy, shaky idle with an intermittent light is a fairly common complaint, and it's almost always ignition, fuel delivery, or an unmetered air leak.

The usual suspects on the Evoque II

• Spark plugs and ignition coils — the most common cause by far. A single failing coil pack on one cylinder gives you exactly this: rough idle, a flicker under load, and a P030x misfire code naming the cylinder.
• Direct-injection fuel injectors — the Ingenium's GDI injectors are known to clog, leak, or fail. A dribbling injector causes a rough idle and a strong fuel smell; a clogged one causes a lean misfire.
• Carbon buildup on the intake valves — a direct-injection engine doesn't wash its own valves, so deposits build up over time and cause rough cold idles and stumbling.
• Vacuum and intake leaks — a split PCV diaphragm or a cracked intake hose lets unmetered air in, and the ECU can't keep the mixture stable at idle.
• Fuel pressure problems — a tired low-pressure pump or a failing high-pressure fuel pump on the GDI side will starve the engine at idle.
• Sensor and software issues — a lazy MAF, a contaminated MAP sensor, or an outdated ECU calibration can all produce idle instability.

What I'd check first, in order

Before you touch a single part, plug in a proper scanner and read both stored and pending codes, plus the freeze-frame data and fuel trims. A P0302 tells you cylinder 2 — swap that coil to another cylinder and see if the misfire follows. That one test saves people hundreds. Next, pull the plugs and read them: a wet, black plug points at an injector, a worn electrode at ignition. Check fuel trims at idle versus 2,500 rpm — if the trims improve with revs, you're chasing a vacuum leak. Then pressure-test the intake and inspect the PCV. Only after that would I go after injectors and carbon cleaning, and a compression or leak-down test if the misfire refuses to move.

Can you keep driving it?

If the light is flashing while you're driving, no — pull over safely and get it recovered. That's a live misfire dumping raw fuel into the catalyst. If it only flickers now and then at idle and the car otherwise drives, you can carefully nurse it to a workshop: avoid hard acceleration, keep the revs low, and don't leave it idling for long periods. Please don't put it off for weeks, though — a small coil or plug problem is cheap, and a melted catalytic converter on an Evoque II very much isn't.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.