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Blinking check engine light on Porsche boxster 99?

A blinking check engine light (CEL) on a Porsche Boxster 99 (presumably a 986 or 987 generation) is a serious issue. It indicates a misfire condition that could cause catastrophic engine damage if ignored. Unlike a steadily illuminated CEL which points to a problem that might be less urgent, a flashing light demands immediate attention.

Do not continue driving. Pulling over as soon as it is safe to do so is crucial.

Here's why it's so serious and what you should do:

* Misfire: A blinking CEL almost always means one or more cylinders are not firing properly. This can lead to:

* Damaged catalytic converter: Unburnt fuel entering the exhaust system can overheat and destroy the catalytic converter, an expensive repair.

* Damaged piston(s): Continued misfiring can cause damage to the pistons and connecting rods.

* Engine damage: Severe misfires can lead to significant and costly engine damage.

What to do immediately:

1. Pull over safely: Find a safe location to stop driving immediately.

2. Turn off the engine: Don't let the engine run any longer than necessary.

3. Call for roadside assistance: Contact Porsche roadside assistance or a reputable tow truck service. Don't attempt to drive the car further.

4. Obtain a diagnostic scan: Once the car is safely towed, take it to a qualified Porsche mechanic or specialist. They will use a diagnostic scanner capable of reading Porsche-specific codes to pinpoint the exact cause of the misfire. Generic OBD-II scanners might give some information, but a Porsche-specific scanner is recommended for accuracy.

Possible causes (a mechanic will diagnose the specific problem):

* Spark plugs: Worn, fouled, or damaged spark plugs are a common cause of misfires.

* Ignition coils: These components deliver high voltage to the spark plugs. A faulty coil will prevent a cylinder from firing.

* Worn or damaged wires: Problems with the ignition wires can interrupt the spark delivery.

* Fuel injectors: A clogged or malfunctioning fuel injector can prevent fuel from reaching a cylinder.

* Engine sensor issues: Various sensors (crankshaft position sensor, camshaft position sensor, etc.) are crucial for proper engine operation. A faulty sensor can disrupt the timing and lead to misfires.

* Valve problems: In severe cases, a valve problem can contribute to misfires.

Ignoring a blinking CEL on a Porsche Boxster can result in extremely expensive repairs. Immediate action is essential to prevent further damage.