Check engine light goes on around 3000rpm.

Gunnar · 10-17-2007, 04:12 PM

I get 5-2 which is supposed to be fault or open circuit in knock sensor signal.

The engine has been overhauled by the previous owner and they installed a metal head gasket and arp bolts, i'll try to find out where that sensor is located maybe they tore a cable.

As for the check engine on light at higher rpms, can this fault cause that?

Gunnar · 12-30-2007, 07:42 PM

I replaced the entire wiring according to the excellent guide i found here.
So it now has new connectors and a shielded cable wiring leading to the ecu.

The problem is still there.

mkiiisupra · 12-30-2007, 07:54 PM

well if the problem is still there i think that either its wired wrong, or the knock sensor itself is actually bad, gotta get that from toyota just get one and changem out to find out which one is bad

supramacist · 12-30-2007, 10:02 PM

Knock sensors from the dealership are 350 bucks.

12-30-2007, 07:42 PM	#2
Gunnar Intake Join Date: Sep 2007 Location: Belgium Posts: 38	I replaced the entire wiring according to the excellent guide i found here. So it now has new connectors and a shielded cable wiring leading to the ecu. The problem is still there. Last edited by Gunnar; 06-14-2009 at 03:28 PM.

12-30-2007, 07:54 PM	#3
mkiiisupra Lexus & 550's Join Date: Sep 2007 Location: Las Vegas, NV Posts: 570 Blog Entries: 1	well if the problem is still there i think that either its wired wrong, or the knock sensor itself is actually bad, gotta get that from toyota just get one and changem out to find out which one is bad __________________ 1990 Toyota Supra Turbo A/T ------------------------------------------------ Questions about oil? take a look http://www.supramania.com/aehaas/

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10-17-2007, 04:12 PM	#1
Gunnar Intake Join Date: Sep 2007 Location: Belgium Posts: 38	I get 5-2 which is supposed to be fault or open circuit in knock sensor signal. The engine has been overhauled by the previous owner and they installed a metal head gasket and arp bolts, i'll try to find out where that sensor is located maybe they tore a cable. As for the check engine on light at higher rpms, can this fault cause that?

12-30-2007, 10:02 PM	#4
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Knock sensors from the dealership are 350 bucks.