Fault Code Help

[booker]

The vsc ,cel lights have been coming on when I have been driving for about half an hour then go out when the car cools down ,

I have had the car read and the code P1135 B1 S1 has come up ,After looking around the web I am now confused as to whether these means the maf or O2 sensor the car is going to a tuning specialist thursday but I would appreciate clarification before that so I am not ripped off for unnecessary parts

Car is an 2001rx I will be grateful for any help

[paul_k]

I've only got the codes for a Nissan 350Z but thought they were the same (OBDii)

P1135 Is Intake Valve Timing Control, RH Bank 2 Maybe this is Nissan specific?

Paul

[sparkystav]

here you go:

LEXUS Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

[booker]

Thanks Paul for the quick response but i think the codes are different

[booker]

here you go:

LEXUS Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

Thanks for that and the quick reply but what exactly does it mean needs doing and how much £ non lexus sorry but im a bit lost with anything technical

[P4UL T]

try this site for help in the future

http://www.troublecodes.net/Lexus/

[Einstein]

From that.. the heater on your O2 sensor is faulty...

The heater is there to give a reading sooner from a cold start, but once warm it would be fine..

It won't cause much of a problem with your car, and only be wasting a small amount of fuel from cold..

a replacement is the only cure.

there are universal sensors which utilise the existing leads from your old sensor, and can be bought very cheaply.

check http://www.buypartsby.co.uk/lambda_sensors.php

Can someone please confirm it would be the 4 wire sensor that we need..

John

[MacRS200]

It will be 4 wire as it's heated.

[booker]

Just got the car back from the specialist confirmed p1135 lambda sensor bank1 sensor1 faulty the one next to the bulkhead (But they didnt seem that interested in doing the job)

I am now trying to source a reasonably priced oe part US seems favourite about 160 dollars or a company in essex for £68 plus vat if they can sort out their inventory and find it in their stores , but it sounds promising

I have to phone the guy tommorrow when they have had time to look.I will be getting my loyal local mechanic to fit it (he can be trusted,unlike many others).

anyone know of any other UK suppliers or how much toyota would charge

[adam.sh]

Hi Guys,

Just got my shiny new OBD2 interface and it's telling me my RX has a P1135 too.

www.troublecodes.net tells me that means "Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)"

www.obd-codes.com agrees with this

But this place http://www.2carpros.com/kpages/diagnostic_trouble_codes.htm tells me it means "O2 Sensor Heater Circuit Low Voltage (Bank 1 Sensor 1)"

So, have trawled the web to try to undersand if an Air/Fuel Ratio sensor is the same thing as an O2 sensor, and i'm getting mixed results.

Does anyone here know for sure? And if they do, can they tell me where to find it, please?

Cheers,

adam.sh

[Einstein]

Yes, it's the same thing...

O2 sensors basically sense the amount of oxygen in the exhaust... this varies dependent on the air/fuel mixture...

so in effect, it is sensing the air/fuel ratio.

John

[adam.sh]

Yes, it's the same thing...

O2 sensors basically sense the amount of oxygen in the exhaust... this varies dependent on the air/fuel mixture...

so in effect, it is sensing the air/fuel ratio.

John

Top man! Thanks loads for confirming...

Just need to be sure of location now and I can go ahead and get it sorted.

Am reaaaaaaalllly annoyed that the VSC light comes on aswell as the CEL when there's nothing wrong with the VSC - been driving it like I was on ice since in case it was unstable, and now know that this isn't the case.

Cheers again.

Adam.

[adam.sh]

OK, so been doing a spot of further diagnosis and further research before I decide if I'm going to do the job or not - results inconclusive though...

Firstly, there seems to be an error in some of the fault code lists I've found on-line. Let's try and set the scene. My error code is P1135, which according to everywhere I can find means a problem with the O2 sensor heater circuit on Bank 1 Sensor 1. Not knowing for sure which sensor that was, I decided to unplug any I could find on the car and read the fault codes again, theory being that when I unplug the one that is already faulty, then I wouldn't get any new fault codes.

So, the first one I unplugged was the one in the exhaust manifold on the front side of the engine, sticking out towards the Battery. This gives me a new fault code, P1155, which most sites report as O2 sensor heater circuit Bank 1 Sensor 1. Hang on a minute - that's exactly the same meaning as a P1135 for exactly the same sensor. So, some more research on the interweb followed and the general feeling is that the manifold at the front of the engine is Bank 2. This suggests that some of the fault code listings online are incorrect - look at this example from http://www.troublecodes.net/Lexus/ and you will see that the format leads you to expect a P1155 to be Sensor 1 Bank 2 anyway, and not Bank 1 as shown.

So, in summary, I believe P1155 to mean heater circuit problem on O2 sensor 1 Bank 2. Can anyone verify this 100%??

My next little test was to plug that sensor back in and reset the fault codes. Pretty soon my original P1135 code only came back as you might expect. Next sensor I found (which I guess is an O2 sensor) was after what I believe to be the cat and before the centre box. It as a little shield bolted on to protect the forward side of it and the cable goes up through a grommet in the floorpan underneath the passenger seat. Removed said seat to allow me enough room to lift the carpet a little and unplug the sensor. Started car and read the codes a number of times, but no new codes were returned, only the original P1135.

So thought that was it and had found the dodgy sensor. Then I got thinking and wondered whether this really was Bank 1 Sensor 1 as other reports told me that Bank 1 Sensor 1 was located on the manifold on the back of the engine and not in the location I was looking at. So, I tested the resistance on the what I believe to be the heater circuit on each of the sensors I had found by testing across the black wires. The one at the front of the manifold returned 1.4 ohms and the other one 14.2 ohms. This tells me that one of them isn't right (you would sensibly expect them to be the same if they were both good) which again points towards the second one I found being bad.

I did manage to locate another sensor in the manifold on the back of the engine, but was unable to get access to unplug it and therefore test further. General internet opinion leads me to believe that this is Bank 1 Sensor 1 and therefore the one I need to replace, but that doesn't explain what I saw when playing around with the sensor under the passenger seat!

So, what I'm looking for is someone who can confidently and categorically tell me which sensor is which. Is there anyone out there?!? Please?

Laters...

[TigerFish]

Can't help on locations and fault codes for the sensors but at 20°c (68°f), the heater coil resistance should be between 11.7 and 14.3 ohms.

[Einstein]

I would say that 1. odd ohms is pretty close to open circuit...

John

[TigerFish]

I would say that 1. odd ohms is pretty close to open circuit...

John

Short circuit

[Einstein]

er... er.... er.... yeah, go on ! :duh:

and here's me with a C&G in electronics as well... *** do I need some kip

John

[booker]

hope this helps

[adam.sh]

It does some... Biiiig Thanks :D

Where did you manage to find it?

Cheers,

Adam.

[booker]

its from one of those supposedly full cd workshop manuals off eBay they are ok but not very detailed and do not cover everything they claim too

[HiTech]

John

Top man! Thanks loads for confirming...

Just need to be sure of location now and I can go ahead and get it sorted.

Am reaaaaaaalllly annoyed that the VSC light comes on aswell as the CEL when there's nothing wrong with the VSC - been driving it like I was on ice since in case it was unstable, and now know that this isn't the case.

Cheers again.

Adam.

Your VSC light is on because it also detects a fault in the engine control, and because there is a fault there *it* is not sure weather *it* would be able to control trottle position/engine revs in the event of a skid so the VSC system goes in to fail safe and alerts the drive that it is no longer active.So inactual fact it did exactly what its surspose to do in this situation,as in make you drive with more caution

[rxsurfer]

The vsc ,cel lights have been coming on when I have been driving for about half an hour then go out when the car cools down ,

I have had the car read and the code P1135 B1 S1 has come up ,After looking around the web I am now confused as to whether these means the maf or O2 sensor the car is going to a tuning specialist thursday but I would appreciate clarification before that so I am not ripped off for unnecessary parts

Car is an 2001rx I will be grateful for any help

Hi, i have a 2001 RX300 & have this problem ( fault code P1135 ) looks like it is to do with either a fuel/air ratio sensor or an 02 sensor problem, i have read all the 2007 replies to booker who had the same fault, however i could not see what he eventually did to cure the problem:- location of the part/cost/can it be done by an amature mechanic like me.

Can any one help as this engine management/VSC fault on my dashboard is annoying.

[fil4362]

sorry to say this guys but holy cack. any body want to know a fault code pm me i have every fault code for every car out there. I just had a pm of a guy who i helped out with his Lamdba/oxygen sensor fault code he thanked me and then added he ordered one.

for wait for this £120 quid woo hoo some one got taken there i replaced mine and my mates (both came on within a fortnight of each other) with an ngk unit costing less than £50. Both have been perfect and that since november ish!!