I got a problem. Knock sensors?
Thread Starter
Joined: Apr 2006
Posts: 549
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From: Little Rock Ar
I got a problem. Knock sensors? Well I was getting my car tuned and the power would just flat line at 4000rpms and it ended up throwing a knock sensor B code. I can notice it has lost alot of power. Does anyone have any experience dealing with knock sensors that could chime in.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Thread Starter
Joined: Apr 2006
Posts: 549
Likes: 0
From: Little Rock Ar
To me it feels like it has lost alot of power. Well I got a diagnostics test done and it threw therse codes- PO1637 Generator "L" Terminal, P1153 02, P1133 O2, PO332 knock sen2 ckt low input B2, P0160 02 B2S2. Well I dont have any back 02 sensors because I am runnign an ory. The guy that performed the diagnostic thought the reason it probly threw the front 02 code is because it is having to work harder since there is no back 02s <never heard of that before. Also they told me that they dont think the knock sensor would be making the power flat line like that. I thought the knock sensor would reset the timing and not make it flat line but its throwing that code. The guy told me he didnt think it was the problem and didnt want to have to charge me for the work if it wasn't going to fix it $500.00 parts and labor. Can anyone help please.
Looks like more then one problem to me. Just get the rear o2's tune out or run sims. I recently tuned a car ( a couple times) that went to the dyno and had similar issues. After he came back from the dyno, I found a knock sensor problem. No matter what I did I could not get rid of some retard. I told the owner that there was a knock sensor problem. He wanted to swap a ls6 intake on anyways. A few weeks later he pulled the intake and found the rear knock sensor completely corroded, the wires shorted etc....an incredible mess. It looked like water collected in the rear knock sensor hole for about a year. New knock sensor harness and new knock sensor and all is well. About 50$ I think in parts.
