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01-07-2016, 02:59 PM | #19 | |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Quote:
Actually the misfire is probably what caused the 420 code. It's actually crazy how far out the readings on the sensors can be screwing with other components and not set a code. |
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01-07-2016, 03:00 PM | #20 | |
I've made a toast!
Drives: 2001 Echo Join Date: Jan 2016
Location: Charlotte
Posts: 12
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Quote:
I'm still not certain which pin to test the white one on the OBD ? How would one go about replacing that sensor if it is bad, any tips/tricks ? Also, are there tests that can be done to diagnose a bad MAF? Oh, ok gotcha ! |
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01-07-2016, 03:08 PM | #21 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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The P0420 code is a cta efficiency error, either your cta is clogged from the misfires or something else. I'm not sure if this could cause multiple misfires you're experiencing maybe Bluevitz can chime in on that
*EDIT, looks like he beat me to it :D
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01-07-2016, 03:14 PM | #22 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Ok, just checked and there's no O2 wire on your OBD port, it's only available on Conector C Pin 16 on the ECU. It is a white wire. Pin 13 is also white, but is the knock sensor.
The reading should oscillate from .050V - .900V So in other words, within 1V. It should swing back and forth if you hold the revs at about 2000. If it's not going all the way up and all the way down, the sensor is shot. Mine was reading 0.100-0.550V and no code we set but my millage was getting bad and I had a rougher idle. My fuel trims where shooting up to +23% at idle. Changed the sensor and started getting 100km more per tank and the idle smoothed out a bit. edit: for reference, low voltage is a lean reading and high voltage is a rich reading on an O2 sensor. If the sensor is only showing the ECU half way up the scale it'll think its too lean and start increasing the fuel trims. It can get to the point that it's so rich it's flooding the engine and fouling up the cat. Another indicator can be a rotten egg smell from the exhaust. |
01-07-2016, 03:54 PM | #23 | |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Quote:
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01-07-2016, 04:32 PM | #24 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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One shouldn't be any more susceptible to wear than the other. With that said, the primary has a lot more influence on the AFR than the Sub, so it can be noticed easier than a failing Sub sensor. The Sub's main job is to monitor the Cat's efficiency.
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01-07-2016, 05:42 PM | #25 |
Drives: 2007 Join Date: Feb 2014
Location: motown
Posts: 339
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An easy check for a air leak is to spray WD40. If your idle picks up you have a leak.
Check when you are having the problem, sometimes heat causes the expansion to cause the leak. |
01-07-2016, 05:52 PM | #26 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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^although it'll work it is messy as he'll, there's no way i'm spraying that on my baby!
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01-07-2016, 09:18 PM | #27 | |
I've made a toast!
Drives: 2001 Echo Join Date: Jan 2016
Location: Charlotte
Posts: 12
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Quote:
So I'm thinking now its a leaking gasket somewhere, what do you all think ? Also I will check my o2 tomorrow with the voltmeter thanks for the pin information and general o2 information bluevitz ! :) |
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01-07-2016, 10:56 PM | #28 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Check the O2 sensors to rule them out. And then invest in a scan tool that does readings as well. You'l thank yourself down the road and it'll easily pay for itself.
Use fuel trims to check for a vacuum leak. Just Google fuel trims or use the search function on the forum and info will pop up
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01-14-2016, 02:15 PM | #29 |
I've made a toast!
Drives: 2001 Echo Join Date: Jan 2016
Location: Charlotte
Posts: 12
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Turns out it was my VVT solenoid, it would keep the car in really advanced timing after heating up causing the issues.
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01-14-2016, 02:51 PM | #30 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Yeah that would do it. Was it clogged or something? I've never head of the solenoid failing other than it getter broken.
Did someone perform an active test on it to confirm. Sent from my iPod Touch |
01-21-2016, 09:41 AM | #31 | |
I've made a toast!
Drives: 2001 Echo Join Date: Jan 2016
Location: Charlotte
Posts: 12
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Quote:
Y'know I didn't really think to ask. I took it to a shop because uni was starting and I didn't have the time. My guess was it was gunked up because, admittedly, I was embarrassingly behind on my oil change. I should have asked for the old part back :x But then again the car drives much much better, so it would seem the solenoid had been having issues beforehand. |
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