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#1801122 - 03/02/10 06:27 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: OpticNerve]
wiswind Offline


Registered: 11/03/04
Posts: 1009
Loc: Wisconsin
As mentioned.....Genuine TOYOTA OEM parts are usually a reasonable price.....certainly competitive with aftermarket.

One site that I have found useful is toytotapartszone They have you put in your VIN and they have some very nice diagrams that identify the parts.......then you scroll down below the diagram and pick out the part number from the diagram.......and "add to cart".

Helps you get the right part the first time when ordering online.

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#3249791 - 01/15/14 10:43 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Zacharya Offline


Registered: 01/15/14
Posts: 5
Loc: Texas, USA
Hello all. I have a 2000 Avalon with 186,000 on it. CEL came on but the car has been running fine until now.

Got the codes ran and it came back with ten of them, and I figured there was a reason that probably wasn't 10 bad sensors, or components. I know nothing about all these [censored] sensors besides the fact that they are a PITA.

The car has now started running rough at idle while in gear, and while driving gets a surging problem I guess would be what to call it. While driving it starts to lurch like someone inexperienced taking off in a standard transmission car, a tech told me my timing didn't seem right, and one of the codes he told me was the VVTI...

I apologize if my format isn't how you guys prefer, but I have no forum experience. I am going to list every code auto zone gave me, and tomorrow the ones the other shop gave me because autozone didn't pick up on the VVTI unless it was one of the codes that came back with no information.

1.P0325 Knock Sensor bank 1
2.P0125 Coolant Temp for closed loop fuel control
3.P0330 Knock sensor Bank 2
The rest of them their scanner could not tell me what they were.
4.P1155
5.P1155
6.P1346
7.P1349
8.P1150
9.P1153
10.1346

I noticed very stiff brakes, and a hard time stopping today when I almost ran over a squirrel, and it definitely did not feel like a normal stop.
The car sometimes feels as though I tapped the brakes very quickly on the Highway, and there is no drop in the Rpms. I was told it was the transmission which does shift perfectly. The only transmission or potential transmission problem I have encountered is at highway speeds if I mash down on the accelerator the engine acts as if the car is gonna take off,it down shifts, the rpms climb, and the speed doesnt pick up.

If anyone can lead me in the right direction I would greatly appreciate it. I am a student with limited income, a new born, and a wife with heart problems, so I need my vehicle to be reliable which is why I picked an Avalon.

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#3249793 - 01/15/14 10:45 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Zacharya Offline


Registered: 01/15/14
Posts: 5
Loc: Texas, USA
I shared this to this page because the original person who posted this threads problem sounded similar, but not as severe as mine. Any how I appreciate any help that might come. I bought a chiltons for the vehicle, and am ready to try to tackle this problem myself. I can get the codes ran at a shop with a better scanner to see what they come back with for the blank codes that were thrown my way. I think I should also add the fact that I found oil in the intake resonator box, not a lot, but it was definitely there.

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#3249858 - 01/16/14 12:07 AM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Zacharya Offline


Registered: 01/15/14
Posts: 5
Loc: Texas, USA
1.P0325 Knock Sensor bank 1
2.P0125 Coolant Temp for closed loop fuel control
3.P0330 Knock sensor Bank 2
4.P1155 AF sensor heater circuit
5.P1155^^^
6.P1346 VVT/camshaft position sensor circuit range/ performance bank 1
7.P1349 VVT
8.P1150 AF sencor heater circuit
9.P1153 Airfuel circuep response
10.1346 VVT/ camshaft position sensor circuit range/ performance bank 1

Sorry to post again, but I found the codes that were blank. Seems to me that this is not a transmission problem and Toyota is not too competent in my area.

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#3249951 - 01/16/14 07:10 AM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: Zacharya]
KitaCam Offline


Registered: 11/16/12
Posts: 1488
Loc: SunnySouthFlorida
Originally Posted By: Zacharya
1.P0325 Knock Sensor bank 1
2.P0125 Coolant Temp for closed loop fuel control
3.P0330 Knock sensor Bank 2
4.P1155 AF sensor heater circuit
5.P1155^^^
6.P1346 VVT/camshaft position sensor circuit range/ performance bank 1
7.P1349 VVT
8.P1150 AF sencor heater circuit
9.P1153 Airfuel circuep response
10.1346 VVT/ camshaft position sensor circuit range/ performance bank 1

Sorry to post again, but I found the codes that were blank. Seems to me that this is not a transmission problem and Toyota is not too competent in my area.


Check in at ToyotaNation.com where several members are Toyo Techs and can offer very good informantion and advice.
_________________________
Kitacam is an 05 Camry LE/I4/MT 120K miles as of 6/19/14 running PP 5w-30...7k OCI, 8oz added this OCI

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#3249960 - 01/16/14 07:28 AM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
supton Offline


Registered: 11/09/08
Posts: 4492
Loc: NH
You can google the unknown codes. For instance:

http://engine-codes.com/p1155_toyota.html

The P1155 comes up as "P1155 Toyota - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1"

Did they all occur at once? Slowly creep up? All of those makes me think it's either a faulty ground, or perhaps an old battery, maybe low system voltage. Can you read the battery and see how old it is?

Almost wonder if one whole connector to the ECU popped off.
_________________________
2004 VW Jetta Wagon, TDI, 5spd manual, 297kmile, his
2011 Toyota Camry, base, 6spd manual, 76k, hers
2010 Toyota Tundra double cab, 4.6L, auto, 88k

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#3250156 - 01/16/14 11:06 AM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Thermo1223 Offline


Registered: 04/18/05
Posts: 1677
Loc: Easton, PA
Clear all codes then drive around and see which reappears also you could check with a better scan tool if there is any freeze frame data.
_________________________
2004 - Jetta Wagon TDI - Gone
2009 - Subaru Forester XT - 4AT 5k OCI
2014 - Scion xD - 4AT Toyota Care

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#3250197 - 01/16/14 11:56 AM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Zacharya Offline


Registered: 01/15/14
Posts: 5
Loc: Texas, USA
Okay, I signed up with them guys, just waiting on a response. The other codes were for the variable valve timing. I am pretty sure it is the oil control valves/valve which from my understanding from hours online can be the cause of the other codes. The ocv works with the timing.

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#3250325 - 01/16/14 02:04 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Vikas Offline


Registered: 07/22/05
Posts: 8051
Loc: NorthEast
RE: "Brakes did not work or very hard to apply" - massive vacuum leak

RE: "whole bunch of engine codes" - most likely bad ground

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#3250438 - 01/16/14 04:30 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
KeithG Offline


Registered: 02/11/08
Posts: 92
Loc: Iowa
Here's a blast from the past. My car's still running like a champ on the new OCV. If I get near 5K miles on cheap oil, she's start sputtering a bit at idle.

Try running better oil for a while and have a look if your negative battery clamp is loose.

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#3250485 - 01/16/14 05:01 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Zacharya Offline


Registered: 01/15/14
Posts: 5
Loc: Texas, USA
Okay guys will do, thanks. The codes couldn't be caused by bad OCV?

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#3287405 - 02/19/14 04:14 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Kaelinsanity Offline


Registered: 02/19/14
Posts: 2
Loc: PA, USA
Zacharya... Didn't know if you were still having trouble but I wanted to get word out...spent waay to long looking at this problem on a vehicle recently. Here's a bunch of my opinions and info that I've found.... after typing all this I saw the 1349 code you listed... it means your Oil control valve filter is clogged... that's probably triggering all the other cam related codes for bank one... clean the OCV valve and filter for bank 1... read on for brief description of where it is.

P1354 (or P1346)-- Is a essentially a cam/crank correlation mismatch code. The 54 is bank 2 and the 46 is bank 1. There are several potential causes. Based on your rough idle symptom, as well as the time and costs involved. I would advise you to try number 1 and 2 first, and then look at 4, and if the timing belt, tensioner, and pullies are good, and all timing marks line up properly, then tackle number 3.

1. The Oil control valve is bad
2. The screen for the OCV is clogged (remove bolt on side of head near the OCV ... the screen is in there, clean it.
3. The VVTi cam gear is sludged up and need replaced... there is no way to clean it (from a competent sounding guy on the net who tried)
4. The timing belt has jumped a tooth or is stretched.

I just spent a good deal of time looking at this code and researching. I found several Toyota/Lexus techs saying that in some cases the cam gear needs replaced in addition to replacing the OCV and screen...

As for your other codes, I agree that you should erase the codes and see what comes back, and then address them. If you've been driving with the CEL on for an extended period, based on your mileage, you could easily pile up those codes legitimately, and none of them stand out to me as likely to be creating your rough idle --- especially in light of all the cam related codes.

Given your description of your situation, and your desire to make the car idle and drive properly, after resolving the P1346 code, I would start with replacing your coolant temp sensor (assuming that code returns), and assuming that your vehicle is properly filled with coolant. Coolant temp sensors have been know to effect idle in some vehicles, though the symptoms usually include longer than normal crank time (have to hold key on longer to start).

The codes relating to the O2 sensor are for the heating elements in the sensors, not the sensors themselves. In other words, those sensors are probably not creating the rough idle condition...unless the rough idle is only during initial warm up.

The knock sensor codes -- unlikely the source of rough idle. You could have a wiring issue with the sensors, or a computer issue, however, based on your mileage, and driving with the CEL on, its more likely that the sensors need replaced. The computer is looking for a particular electrical signal from each sensor, and that signal is not present, or is not making it to the computer, hence it sets the codes. Do not be deceived into believing that the code is being set because the sensor is detecting knock in the engine, that's not whats happening, that's not what the code means, though it's a common misunderstanding. Yes the sensors job is to detect and correct knock, but that knock sensor code relates to the missing (or weak) signal from the sensor, not the detection of knock. A note on knock sensors, on some vehicles, they are particularly sensitive to the amount of torque used to install them, use care to properly torque them. So, Check the internal resistance of the sensors if you can find a spec on it, then check the torque of the sensors, then check the wiring back to the computer for high resistance/bad terminals, then replace the sensors.... or live dangerously and just change out one of them... for the price, it saves a lot of testing...

.... and yes, the VVTi cam codes can cause other codes, but typically not the codes you've listed.... those systems (codes) just aren't closely related enough to cam timing (my opinion and experience)


I'm all typed out, hope this helps someone. Thanks for reading smile



Edited by Kaelinsanity (02/19/14 04:24 PM)
Edit Reason: forgot stuff

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#3287411 - 02/19/14 04:21 PM Re: toyota 1mz-fe misfires & VVT-i related codes [Re: KeithG]
Kaelinsanity Offline


Registered: 02/19/14
Posts: 2
Loc: PA, USA
oh.. The brakes being hard to apply fits perfectly with the cam timing problem... the engine is running so poorly it's not providing the proper vacuum to the brake booster.. many many vehicles can run poorly without creating problems with the brakes, but toyota/lexus is more sensititve somehow... I know this sounds unlikely, but trust me I've seen it on two different lexus and 3 toyota.... that's not to say you couldn't have a vac leak, but I've seen it relate to the cam codes on the VVTi models...

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