Knock Sensor...WTF
Thread Starter
Race Director
Joined: Oct 2001
Posts: 19,653
Likes: 428
From: Melbourne Florida
Cruise-In IV Veteran
Knock Sensor...WTF
The fans started coming on with a cold engine and then an SES light... had it scanned and coded a knock sensor ( so I was told)... had two new sensors put in this afternoon, left the shop and 10 miles later the fans come on (192 degrees) and the SES light :mad .. any clues out there ?? all help is appreciated...
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: Knock Sensor...WTF (golfboy1)
Sounds like you ended up hitting some kind of limp home mode routine since the fans were comming on with the engine cold.
Go out, turn the key ON and see if the fans come on. If they do, go back to the shop and set em straight. Unless you specifically told them to replace the knock sensors instead of 'fix my problem', they should make ammends with you. -Matt-
Go out, turn the key ON and see if the fans come on. If they do, go back to the shop and set em straight. Unless you specifically told them to replace the knock sensors instead of 'fix my problem', they should make ammends with you. -Matt-
Thread Starter
Race Director
Joined: Oct 2001
Posts: 19,653
Likes: 428
From: Melbourne Florida
Cruise-In IV Veteran
Re: Knock Sensor...WTF (HighHopes85)
Thanks for the thought 85... just turned it on... no fans... my corvette guy coded it as knock sensors and replaced both.. something is making the fans come on below 220 degrees :confused: ..guess I'll have to show up at his shop Monday and see what the SES codes this time...
Burning Brakes
Joined: Aug 2001
Posts: 797
Likes: 2
From: Westminster MD
Re: Knock Sensor...WTF (golfboy1)
My 96 set codes for the knock sensors that ended up (likely) being a bad computer. After it set about 6 codes at once they swapped it out - and 3 computers later it was fixed. Yes, they got 2 bad ones in a row. Gotta love "remanufacturing".
Race Director
Joined: Jun 2001
Posts: 10,956
Likes: 680
From: Marlboro country MA
Re: Knock Sensor...WTF (TravisD)
My '92 auto was throwing a code 43 last summer. Swapped out the knock sensors without success. Swapped the ecm, and Bingo! No more SES lights.
Rebuilt ecm's are for sale on the forum for under $100, and replacement takes about 15 minutes. Go for it.
Rebuilt ecm's are for sale on the forum for under $100, and replacement takes about 15 minutes. Go for it.
