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jrgcom
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My 2004 cayenne S with 188,000 (I am original owner), has a flashing PSM on dash when rpm is above 4000 or above 60 mph, in stop and go traffic, I noticed if I speed up to about 20, slack off throttle, there is a couple of clunks coming from the rear of car (does not appear to be shifting, not an unusual hard shift). Also having a code P0491 which is secondary air pump. Are these related?
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Does this affect the transmission shift or the sound I am hearing tin the rear of the car at low speed once I accelerate and slow in traffic?
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My 2004 cayenne S with 188,000 (I am original owner), has a code P0491 which I determined was a blown fuse for Bank side 1 (passenger side of car). I replaced fuse and it has blown our immediately upon cold startup. What should i explore to find the culprit? Also, I added tires yesterday to the rear, and I now have a flashing PSM on dash when rpm is above 4000 or above 60 mph, in stop and go traffic, I noticed if I speed up to about 20, slack off throttle, there are a couple of clunk sounds coming from the rear of car (does not appear to be shifting on the display, only on occasion it has a hard shift, does this in manual and drive). Does this relate to a P0491 code?
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I found a blown fuse for pump bank 1, replaced fuse and it immediately blew upon cold start up. What should I test to determine cause. Cayenne has 188,000 miles. no problem til this. Also at same time, maybe a coincidence, shifting noise coming from rear of car at 20 mph or less when in stop and go traffic, speed up and then let off throttle and something knocks from back of car. Does emissions pump failure affect this?