Lambda Sonsor

[nezerr]

hi all,

im looking for 2 new direct fit lambda sensors for my 2.0 avensis... does anyone know where mite be the best place to look other than from Mr T

thanks

neil

[gordi]

My car is the Mk2 but I assume the engines are very similar , my lambda sensors are in the exhaust manifold just behind the radiator , one either side , looks like its going to be a tool like a spark plug spanner to remove them .

[Hati]

My car is the Mk2 but I assume the engines are very similar , my lambda sensors are in the exhaust manifold just behind the radiator , one either side , looks like its going to be a tool like a spark plug spanner to remove them .

You missed his point. He is lookin for a place where he can buy new lambdas, not where to find them physically on the car.

[nezerr]

yeah im looking for a place to buy new replacment direct fit lambdas

[t-spiritpete]

hi all,

im looking for 2 new direct fit lambda sensors for my 2.0 avensis... does anyone know where mite be the best place to look other than from Mr T

thanks

neil

Hi Neil, this looks like a good supplier of Bosch lambda sensors at the right price http://stores.shop.ebay.co.uk/POWERSPARKS_...634Q2ec0Q2em322 not had any personally but they seem ok.

Regards Pete.

[nezerr]

thanks pete,

i now need to know the location of bank1 sensor2 and bank2 sensor1... i cant seem to find anyone in the trade who is 100% sure of the locations of these sensors and mr T wants £460 to fit them, im told the sensors only have a life of 30.000 miles so not happy about paying out all that cash for a spark plug type part if you know what i mean

[Beagh1958]

To nezzer,

Bank 1 sensor is in the exhaust manifold before the cat & Bank 2 sensor is in your exhaust pipe after cat if fitted, access from under vehicle. You will require a 22mm crow foot spanner to remove items. As to life span of sensors only being 30,000miles (complete bull) your only going to know if sensor has failed maybe if you fail your MOT on your smoke test & only then if garage diagnosticss show sensor to be at fault.

Regards, Beagh.

PS, Why are you changing both sensors, if indeed you are.

[nezerr]

after taking it for an mot twice (first MOT was on cold engine) it failed on emissions, heres the results

first test engine cold

CO <= 0.300% ----------- 5.827% FAIL

HC <= 200PPM------------- 278PPM FAIL

LAMDA 0,970- 1.030------- 0.833 FAIL

SECOND TEST ENGINE HOT

CO <= 0.300%--------------------- 1.493% FAIL

HC <= 200PPM--------------------- 62PPM PASS

LAMDA 0,970- 1.030--------------- 0.950 FAIL

After the mot i took the car to Toyota for a check over heres the results

engine code faults:-

P0125 COOLENT TEMP CLOSED LOOP

P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2) BANK 1 SENSOR 2

P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)

P0153 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)

P1653 SCV MOTOR CURCIT

C1203 ENGINE CONTROL SYSTEM COMM CIRCUIT

The engineer said the main faults were the oxy sensors which may cause the other codes the come up.

im at a toltal loss with it now unless i spend ££££ at toyota dealer and the cars not really worth that much.. i can get the direct fit sensors from

http://www.onlineautomotive.co.uk/search_r...amp;se_bt_id=12

but they wernt sure exactly which sensors are bank1 sensor2 and bank2 sensor1

info on sensor life from... http://en.wikipedia.org/wiki/Oxygen_sensor

Sensor failures

Normally, the lifetime of an unheated sensor is about 30,000 to 50,000 miles (50,000 to 80,000 km). Heated sensor lifetime is typically 100,000 miles (160,000 km). Failure of an unheated sensor is usually caused by the buildup of soot on the ceramic element, which lengthens its response time and may cause total loss of ability to sense oxygen. For heated sensors, normal deposits are burned off during operation and failure occurs due to catalyst depletion, similar to the reason a Battery stops producing current. The probe then tends to report lean mixture, the ECU enriches the mixture, the exhaust gets rich with carbon monoxide and hydrocarbons, and the mileage worsens.

Leaded gasoline contaminates the oxygen sensors and catalytic converters. Most oxygen sensors are rated for some service life in the presence of leaded gasoline but sensor life will be shortened to as little as 15,000 miles depending on the lead concentration. Lead-damaged sensors typically have their tips discolored light rusty.

Another common cause of premature failure of lambda probes is contamination of fuel with silicones (used in some sealings and greases) or silicates (used as corrosion inhibitors in some antifreezes). In this case, the deposits on the sensor are colored between shiny white and grainy light gray.

Leaks of oil into the engine may cover the probe tip with an oily black deposit, with associated loss of response.

An overly rich mixture causes buildup of black powdery deposit on the probe. This may be caused by failure of the probe itself, or by a problem elsewhere in the fuel rationing system.

Applying an external voltage to the zirconia sensors, e.g. by checking them with some types of ohmmeter, may damage them.

Symptoms of a failing oxygen sensor includes:

Sensor Light on dash indicates problem

Increased tailpipe emissions

Increased fuel consumption

Hesitation on acceleration

Stalling

Rough idling

[Beagh1958]

To nezzer,

The amount of faults you have would appear endless, but i would not dispair. So from what the technician has read from ECM, i amagine from experience he has concluded the other faults to be ghost faults. Did Toyota clear all the faults from ECM memory & then take vehicle for test-drive before plugging car back into computer to see what comes up again? This is the corect way to check for engine faults.

So simply your car is over-fuelling. It would appear that you do require two lambdas, but do not discount coolant sensor, as this unit sending incorrect signal to ECM can also result in over-fuelling.

As suggested above by other forum user, if purchasing non Toyota parts, go for quality ie: Bosch, Denso or Lucas.

Good Luck, Beagh.

[Hati]

You have 4 lambda sensor on your car. You have two cat's and one lambda on each side of the cat.

[Beagh1958]

To nezzer,

Try following link, www.boschautoparts.co.uk, has dealer specialist locator, showing a minimum of 4 within the lincolnshire area alone. Maybe also you could get a second opinion to pinpoint exact fault.

Regards, Beagh.

[nezerr]

Thanks Beagh,

I phoned a local Bosch garage but they want to charge me for Diagnostics again before they can quote me a price for the repairs, im guessing its not going to be much cheaper than mr T so gonna try replacing the lambda's myself if i can find out the correct location for bank1 sensor2 and bank2 sensor1.. surely there must some sort of diagram or information out there regarding these location's, i could do to speak with a toyota technician really

thanks again,

neil.