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Cayenne s misfire rough idle

Dawdoo
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Dawdoo Member

Dawdoo

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Posted (edited)

Hello

i have problem with my cayenne s 955 2004

 

codes: 

P0139 - O2 sensor circuit slow response (bank 1 sensor 2)

P0300 - Random multiple cylinder misfire

P0301 - Cylinder 1 misfire detected

P0303 - Cylinder 3 misfire detected

 

Sometimes i have code from camshaft position sensor 

Rough idle and vibration 

What is it ? I have all new spark plugs and coils, cleaned throttle..

Edited by Dawdoo
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Loren Member

Loren

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:welcomeani:

 

The number one cause of misfires on the early Cayenne's is ignition coil failures.

If you remove and measure the resistance (in ohms) of a misfiring cylinder and know good cylinder you will see a huge difference in resistance.

If the car has not had the coils changed in the last 2 or 3 tears then I would change them all to the latest version.

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