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P1025

Jtjnt
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Jtjnt Member

Jtjnt

Posted
Posted (edited)

I have read about every bit of information about this p1025 code I’m fighting with.

 

i have a 2009 cayenne s. 81,000 miles

 

it all started with a 1026,1025 and all cylinders mistfiring.  Rough and long crank times while cold.   Tell tale signs of a bad HPFP.  

I replaced that pump and did the coils and plugs and CPS at the same time.  

Cleaned the throttle body and Mass airflow sensors.

All the codes cleared except the 1025.  Car start right up cold.  Does do a little idol surging but seems to settle down after a couple mins. 

Car seems to drive fine.  The only little issue is on the highway at 2100rpm the engine may hiccup every so often. 

I haven’t done the fuel pumps or filter yet.  Was hoping someone had some ideas. 

I didn’t wanna be another guy that replaced his HPFP to have it be something else. 

 

I have also done the throttle body reset. 

 

Thanks 

Edited by Jtjnt
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