Geely Cityray Check Engine Light Flickering and Rough Idle: What's Going On?

Why Does the Check Engine Light Flicker at Idle?

When that light flickers rather than staying steady, it usually points to a misfire or an intermittent sensor reading. On a Cityray, the most common cause is a minor ignition or fuel delivery issue that only shows up at low RPM when the engine is under less load.

Likely Causes to Check First

• Spark plugs and ignition coils - A worn plug or failing coil can cause a rough idle and a flashing check engine light.
• Vacuum leaks - Cracked hoses or a loose intake manifold gasket can upset the air-fuel mixture.
• Throttle body and idle air control - Carbon buildup can make the idle unstable.
• MAF sensor - A dirty or failing mass airflow sensor can send wrong readings that trigger the light.
• Fuel system - Clogged injectors or low fuel pressure may cause intermittent hesitation.

Is It Safe to Keep Driving?

Generally, if the light is only flickering and the car still drives smoothly when you press the accelerator, you can get it home or to a shop. But if the light stays on steady or starts flashing rapidly, that means a serious misfire that can damage the catalytic converter. In that case, pull over and turn the engine off.

Start by scanning the OBD-II system for codes, then inspect the simplest items like spark plugs and vacuum hoses. Cleaning the throttle body is a common fix on Cityrays with higher mileage. If you're not comfortable doing the diagnosis yourself, a good shop can pinpoint the issue in under an hour.

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