I need help..... you know there is a problem - Toyota Nation Forum : Toyota Car and Truck Forums

camrtm3 · 08-17-2011, 08:35 PM

Ok, So I went down to OC MD last week for vacation. Get to show off the Camry right? NO! I get down there and put an STi in its place and I get a knock sensor bank 2 code. So I take it to my condo and attempt to diagnose it. I clean up the sensor and reconnect it. The entire week bank 2 was failing. So I come home early. Ride home bank 1 and 2 failed. Which is what I was waiting for cause I wired my sensors together to 1 sensor. So the sensor died. OK, I get back to town and buy a new sensor and install it. Yes I was happy worked for all of 2 miles..... Bank 2 failed again. So I took out the harness. Found it was grounding. So I take it out and re-term all the connecters. I take it out. Works. This morning I went to work. I pull out of my neighbor hood bank 2 fail. Cept this time I can clear the code while driving. I get home clear it, re-re-relocate the sensor back to my relocation spot, put my exhaust silencer in, which I never do, and I take it out. Bank 2 fail again, now you think after all this bank 2 fails I would be having detination. NO I was listening to the engine the entire time, no pinning at all. I eventually put the harness. Now you all are going to laugh. So I have no sensor, Bank 2 failed! WTF?! So I continued to drive the car then bank 1 failed........

All I can say is WTF..... WTF. Any Ideas?!!?!?!?!?!?!?!?!?!?!?!?!?!?!

Chris Crash · 08-17-2011, 09:17 PM

The code is purely an electrical problem. Either the sensor, wiring, or ECU. It's not from detonation. How long have you had the two wires going to one?

camrtm3 · 08-17-2011, 09:30 PM

It was Rob's old wire harness. I know this theory works. So many people just put them together. Should the connector on the sensor be tight? mine wiggles a bit. not much, but it does wiggle.

sam333 · 08-18-2011, 03:02 AM

The ECM listens for a "normal mode vibration frequency" that is, the vibration the engine puts out when running normally. If it does not get this signal it goes into a failsafe mode and retards your timing to the max value( noticeably less power).

When your knock sensor is working normally the ECM is constantly advancing your ignition timing to a point where the sensor and ECM "sees' detonation is about to occur and then retards the timing just below this point. This goes back and forth constantly trying to get the most power out of the engine without detonation.

camrtm3 · 08-21-2011, 01:45 PM

Well, I feel kind of stupid now........

Possibly a good thing to Relocate the knock sensor. My engine was knocking. Slightly. Not enough for me to hear, but enough to piss off the sensor. Reason that the sensor was popping codes was I was 1.75 quarts low on oil. woops. I couldn't run the engine hard cause of the code so I didn't do any damage thankfully. But a manual 1mz with a supercharger and relocated knock sensor to the front of the engine, doubles as a low oil sensor now.

a94autoCamry · 08-27-2011, 02:06 PM

get it tuned ASAP. What kind of fuel mods do you have??

***Eye8Pussies*** · 08-27-2011, 04:20 PM

is your motor burning THAT much oil already?? damn

camrtm3 · 08-27-2011, 06:21 PM

Didnt help i am 2K over on my oil change.

dorifuto.boi · 08-28-2011, 10:21 AM

Quote:

Originally Posted by sam333

The ECM listens for a "normal mode vibration frequency" that is, the vibration the engine puts out when running normally. If it does not get this signal it goes into a failsafe mode and retards your timing to the max value( noticeably less power).

I know thats what everyone says... and Im not doubing anyone. But when I ran my car with bank2 knock sensor circuit malfunction, my car's ignition timing didn't stay constant but still moved around 10-20 degrees while i drove.

Does anyone know why that is if its supposed to be retarded to a maximum degree ?

Chris Crash · 08-28-2011, 11:21 AM

Because you still had bank 1 working right?

camrtm3 · 08-28-2011, 11:35 AM

Also tuning the engine would be a good idea.

dorifuto.boi · 08-28-2011, 01:02 PM

Quote:

Originally Posted by Chris Crash

Because you still had bank 1 working right?

yeah. so if you have one still working, then it wont retard to the max ?

no wonder my car didnt feel slow when i had bank2 circuit malfunction lol. i fixed the bank2 cel and my car doesnt feel any faster.

i wonder why people are going around saying their cars are as slow as the 4 cyl with one blown knock sensor...

SirThomas88 · 08-29-2011, 09:09 PM

Are you sure where you spliced the bank 1 and 2 wires together they aren't loose?

I can't imagine being a little low on oil would cause knocking. 1.7q isn't that much... right? Iono.