Hey guys! I have a 2009 Lexus Is250 AWD. My car has started losing power. If I go up a hill at around 55-60mph it hesitates and if I don’t let off the gas I will lose all power and I won’t get up the hill... well I could put with the gas peddle floored I would go about 5 miles an hour. I then have to turn my car off and restart it which gives me full power again. Now when it hesitates if I let off the gas I have no issues. I am throwing PO301, PO172, PO175, and PO430. Any help would be greatly appreciated!

 

Sounds like a failing plug, or coil. When is the last time you changed spark plugs?

 

Thanks! I’ll check into that. It’s been about 4-5 years I’d say.

 

Try switching the ignition coil around. See if the first code changes.

Facing engine cylinders :
5 6
3 4
1 2

P0301 is cylinder 1

Swap 1, and 3 around. Reset codes, and see if it changes.