engine problem
Thread Starter
Driver School Candidate
Joined: May 2011
Posts: 9
Likes: 0
From: va
engine problem
1997 lexus ls400 204500 miles, engine light is on code P0340 (cam shaft position sensor bank 1), rough idle at start, once the car warms up it runs ok but loss of power, hesitates, if press more on gas pedal the car jerks. i have replaced both cam shaft position sensors and engine coolant temp sensor but no improvement. any ideas what could be the problem?
Trending Topics
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Pole Position
Joined: Dec 2009
Posts: 3,278
Likes: 317
From: ct
Are you kidding me? 
Does everyone not know how to SEARCH? http://www.lexls.com/tutorials/EFI/tps.html
Throttle = fuel. Fuel = Throttle body. = Throttle position sensor. In the future try searching before asking.
Does everyone not know how to SEARCH? http://www.lexls.com/tutorials/EFI/tps.htmlThrottle = fuel. Fuel = Throttle body. = Throttle position sensor. In the future try searching before asking.
Thread Starter
Driver School Candidate
Joined: May 2011
Posts: 9
Likes: 0
From: va
God bless computorized translation. Need a translator for the translator. 
Pole Position
Joined: Dec 2009
Posts: 3,278
Likes: 317
From: ct
I would go with the suggestion already mentioned by PureDrifter "check the wiring to the CPS and grab a timing light (and check lexls iirc) to confirm that the timing is right on." If the timing is off just by a tick, it could throw a CPS code. If the wiring connections are all plugged in and the wires aren't cut somewhere then maybe there's a problem with the ECU.