I just pulled a 0304 code the other day. Thats good and bad news to me. Good is that now I know I have more power than I realized and bad is that its gonna cost me. I only have about 56,000 miles, wonder why it went so early.

 

It's not a rare thing for 97's to lose Knock Sensors early. 95-96 models seem to last nearly the life of the car.

 

I didn't know that. I'm just coming up to 60K with my 95SE, so perhaps I'll be good to go for some time.

 

Where did you get this information? I'm just curious because I've been here a while and never heard of such a thing...(which does not imply that it isn't true...)

 

True. I just had mine swapped at 178000 miles.

 

seems like all 4th gen knock sensors go early no matter what. if your knock sensor hasnt gone out yet, your not driving a 4th gen maxima. when i pulled mine out it was cracked in 3 spots on the pastic, yet the crystal part was fine.

 

uh oh, I'm at 50k miles right now.

 

just changed mine at 178,000.... what a huge improvement !!! i guess i got lucky, it only took me 5 min. and a little bloodshed.

 

WOOHOO! I just discovered that I have a bad knock sensor. Oh, joy. Now to find a cheap one.

 

I got no cel so I'm good for now

 

just ordered mine yesterday for 89 bucks ....came out to 94 with shipping

 

It doesn't always trigger a CEL, you might want to check to be on the safe side.

 

i been driving mine with that ks ghost code..heh..i have a new ks but too lazy to put it on..no time lol

 

suckas. . .
(knocking on wood)

 

I was cleaning my TB and forgot to plug in the MAF, so i triggered the SES light. Turns out i had a hidden code- my knock sensor was bad. So a bad ks doesnt always neccesarily trigger the SES light.

 

My Cefiro has 239,000kms and threw the 0304 Code.. Went to test KS before replacing and it came up with the 500kohms expected.. so I CLEANED the contacts and BAM.. KS is working fine.. power is back.. accelaration is much faster and smoother

In short CLEAN your KS harness connections first!!

 

KillerVQ30DE, nice to know that. I'll try that first. Thanks

 

BTW, with what did you clean it?

 

It had a oily grease like residue on the contacts .. unfortunately I didn't have any electrical contact cleaner.. so I borrowed one of my girlfriends makeup remover wipes and just wrapped it around end of screw driver tip and wiped the male metal connectors

You'll know if cleaning is going to help by doing the Ohm test if it comes up with 500kOhm when testing from the end of the KS harness (other end still attached to KS in car) then its most likely the contacts

 

my ks needs to be replaced..i can drive it for a few thousand miles before i replace it??
I just bought a ton of stuff for my stereo, and dont have the money right now..im just hoping my car doesnt die..

 

my ks is out too.. damn to bad it gonna wait a while for it to get replaced.. damn swirl control junk is in the way..

 

i tested mine that way and it was 558 and then the next day decided to test it again and it was 0 .... ahahahaha but i have 1 on the way so oh well

 

mine got replaced at 134,000. Big performance improvement and got 350 miles on a full tank

 

I changed mine at 200K+. ONLY 350 miles on a tank. For me that would suck. I expect at least 400 or I'm mad. I hope it will get better after I change the EGR valve this weekend. Other recent repairs are all 3 O2 sensors and all rotors, pads and calipers. My max will hopefully carry me another 100K+. I love it!

 

Ditto I think, ran the Consult scanner and I'm throwing the 0304 again will put in the knocksensor I brought

 

this is wat i did....first i did the ohm tester.....i put the black on the battery terminal ..and then i connected the red to the harness....i got a reading of 554...this should be good right? so why do i get the code? oh and i have a 96..(i hope that rule about the 95 and 96 is true..lol)

 

Did you try it when the car was Hot or Cold... I think when hot the plastic would expand a little bit which would stress any cracks on the KS.. when cold it might give good reading .

I had same thing brought new sensor, tested old and it showed valid Ohm rating, so never switched, but I think if I retested it when hot it would fail. I think even the motorvale site alludes to that something about don't be surprised when you remove your sensor and test it, that it falls with in valid range.

 

i have gone threw 3 knock sensors since i have had this car for about 2 yrs...its driving me nuts. its even throwing a code when it isnt mounted to the damn block. its just hanging zip tied out of the way. its been pissing me off for a while

 

it is ur connection because i restested the ecu when it was not pluged in and it gave me the code without turning the engine on

 

A knocksensor is like a microphone.. so if you just have it hanging there its going to feel all sorts of knock as it moves.. instead of being bolted hard to the block

The 0304 Code cleary states Knock Sensor CIRCUIT,, so doesn't actually tell you if its the sensor or the cable.. just that it hasn't recieved a resistance back in the alllowed range. So cable unplugged=cel, so would broken cable, or no KS at all at end of cable

 

wouldnt a bad o2 trigger off the ks too? i know after i chaged my ks my o2 sensor went bad. maybe its me..which it probably is

btw mine died at 73k

 

Mine went around 60k miles and its a 97. Guess it has more to do with age than mileage

 

Sometimes it does. My story is kinda strange though. I had a code for a bad o2, kept resetting it, it triggered another o2 code, kept resetting that, and then those two o2's finally triggered the ks code. Silly thing is, I reset them all, and haven't seen the codes come back for months. I replaced the ks about a month ago because I was really bored and seeing the code once justified it in my head. o2's trigger the ks, but would it work the same vise versa? I still haven't seen my o2 codes back yet. I guess that's a good thing.

 

What are the symptoms of a bad KS??

 

Hey i cleaned the connection of the knock sensor (with a flat head and wet bounty-lol) and 120 miles later....no code......knock on wood

 

I have reset the ecu once,the code came back.I reset it once more,and for 5 days now my car runs without SES light but poor performance,at high RPM only...is that normal?Im thinking of changing the spark plugs.

 

the ses light would not come on, u have to pull it out!

 

Soo............ Today i pick up my car from the body shop...finnaly, and i get in the car and woohoo theres my SES light. The guy there is real nice and offered to help me figure it out but i just said id do it, anyway i go home and check the codes YAY!!!! good old 0304 i erase it and drive like 5 miles it didnt come back. this is a 98 i30 that has 80k. i did a volt ohm test a month ago it it came out ok on a cool engine?

What do u think will it come back?

 

I have 98 I30 also and was getting same reading. I used a resister 470 i think from Radio Shack to bypass it, and been putting premium in so there is no knock that I can hear at all. The code did not come back. Before I did that it came back when I checked after 40 or 50 miles. After I clean connections to be sure and rehook the KS up, if it shows bad KS again guess I'll have ot get a new one.

 

Hmmm i wonder why mine set a SES light though