tony595616

It is very rare that one knock sensor goes bad and astronomical that both go bad. I suspect that you have a different problem that is causes the knock sensors to malfunction. It is possible that your cat is plugged and causing this problem. Please post the exact codes that showed up on the scan and go from there...

THANKS FOR YOUR QUICK REPLY

THE CODES THAT CAME UP ARE P0325 AND PO330

I bought this 2002 sc430 with 82k miles 6 months ago have only used 6 times and have driven less than 100 miles mainly standing outside under cover.

All of sudden have slow acceleration and check engine light

had the codes read from auto zone it says both knock sensors bad

can someone tell me where they are located on the sc430 and is it easy to replace

many thanks for your help and advice

i have a 2003 sc 430 supercharged, i recently got a po 325 code [ knock sensor ] i was wondering if any one else ran into having to replace one after 44000 mile ? every one i talk to including lexus say they dont go bad,,, could it be the ecu... once the knock sensor sets the code the lights come on in a litte pretty string, [ engine ] and both [ vss ] lights. also timing stays retarded, and dont reset it self till the code is cleared,, any in sight? procharger c-2 - i-manage, s-s headers, denso 22 plugs, i have had it on for abought a year now with no problems, the code just poped up one day . i checked the harness going to the sensor and its o.k. i"m wondering why it will not set the timing back to where it is suppose to be after the code ? thats what leaning me toward the ecm, i dont want to just throw parts at it to fix it. any help would be cool.... the i - manage is a controler that is not connected to the ecm, its a feul pump that only comes into play under boost. i can set the code just tipping the gas pedal slowly between 2200 2500 rpm sitting in the garage NOT under any type of boost or load, according to my wide band o2 it idles at around 14.5..a/f under boost i have it running fat abought 10.00 to 12.00 a/f pulled plugs both sides look fine. i would hate to remove the plentom to replace the sensor and not be it. any way you know of to check the ecu ? i heard or over sensetive sensors but never ran into it before.

did you fix your problem ?

I bought this 2002 sc430 with 82k miles 6 months ago have only used 6 times and have driven less than 100 miles mainly standing outside under cover.

All of sudden have slow acceleration and check engine light

had the codes read from auto zone it says both knock sensors bad

can someone tell me where they are located on the sc430 and is it easy to replace

many thanks for your help and advice