Here's what you should do:
* Immediate Action: Stop driving the car as soon as it's safe to do so. Continuing to drive with a blinking check engine light could lead to costly repairs.
* Get it Diagnosed: The blinking light needs to be diagnosed using an OBD-II scanner. This scanner will read the trouble codes stored by the car's computer, which will pinpoint the problem. You can:
* Take it to a mechanic: This is the safest and often most efficient option. A qualified mechanic will have the tools and expertise to diagnose and fix the problem.
* Use a code reader: You can purchase an OBD-II code reader relatively inexpensively at most auto parts stores. These will allow you to read the codes yourself, but you'll still likely need a mechanic to interpret them and perform the repair. Keep in mind that some codes require specialized knowledge to understand.
Possible Causes (These are just examples; a proper diagnosis is necessary):
A blinking check engine light often points to a severe misfire condition, which could be caused by:
* Ignition system problems: Worn spark plugs, bad ignition wires, failing ignition coil(s), or a malfunctioning distributor (if equipped) are common culprits.
* Fuel delivery issues: A clogged fuel injector, low fuel pressure, or a problem with the fuel pump could cause misfires.
* Engine mechanical problems: Damaged valves, low compression, or other internal engine problems can also cause misfires.
* Sensor failures: Various engine sensors (like crankshaft position sensor, camshaft position sensor, mass airflow sensor) can trigger a misfire if malfunctioning.
Ignoring a blinking check engine light can lead to significant engine damage, including:
* Catastrophic engine failure: Severe misfires can cause damage to pistons, connecting rods, and other internal engine components.
* Catalytic converter damage: Unburnt fuel can damage the catalytic converter, a very expensive component to replace.
Get your Mercury Marquis to a qualified mechanic as soon as possible to prevent further damage and costly repairs. The sooner you address the problem, the better the outcome will be.
