As described in the title, I've got a EML on and the fault reads:

Fault log report generated by Torque for Android

=================================================

Vehicle Manufacturer: Unknown

Vehicle Calibration ID: Not present

Current Fault Log

------------------

P0030: HO2S Heater Control Circuit (Bank 1 Sensor 1) Pending Fault Log

------------------

P0135: O2 Sensor Heater Circuit (Bank 1 Sensor 1)

I've searched the forum and found this:

http://www.briskoda....35#entry2651271

Anyone know what I need to do to sort this? Is there a cheap easy fix?

Cheers!

Edited 20 October, 201213 yr by trickett_james

Hmmm heater control circuit fault code, could try disconnecting it and testing resistance between 2 heater wires, usually 2 white wires if i remember right altho am not sure what resistance is ment to be altho could try googling it

Cheers. Where about's is it located in the engine bay?

Just seen you're from Wakefield, very odd as I am too.

Any other ideas anyone?

Sensor 1, is I believe the pre-cat lambda, access is from underneath the car on the exhaust just before the cat. If the wiring looks ok, it does sound like the probe has failed.

Once the fault is rectified you should in theory see an improvement in fuel economy since the pre-cat sensor is used to calculate the fuel / air mixture whilst the post-cat is simply used to make sure the cat is working properly.

Cheers manny. Will this definitely need replacing then or could it be a fault?

Am I ok to still drive the car for a couple of days?

Should be fine to drive, your fuel economy maybe down though. Worth checking the wiring and connectors before replacing. They are exposed to the elements down there, and perhaps the connectors are corroded.

Just be glad you don't have my V8. I have 4 lambda probes down there, 2 on each bank of cylinders.

Both probes go into a little box under car, the front probe is the one with more wires, its about where the middle of drivers seat is under car held on with 2 plastic 10mm nuts

Ok, just about to order a sensor, just in case it is that (I'll take it back if it's just the wiring)

Can anyone tell me if the the lambda sensors are the same, or if the pre-cat one is specific?

Wondering if this one will fit? http://www.ebay.co.uk/itm/SEAT-IBIZA-OCTAVIA-VW-GOLF-POLO-LAMBDA-SENSOR-NEW-/230712316324?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item35b78691a4

Cheers

The sensors have a completely different characteristic.

That one looks like the post-cat sensor as it only has 4 wires and a 4-pin plug.

The pre-cat sensor has 5 wires on a 6-pin plug

OK, hopefully found the one I need. Can people confirm this is what I need?

http://www.ebay.co.uk/itm/NGK-NTK-Oxygen-O2-Lambda-Sensor-OZA447-E32-0471-/110878259262

Cheers!

Edited 31 October, 201213 yr by trickett_james

When i got my sports cat i got a pair of used ones for half that

Carnt tell on phone if that is right, will look when i get home

If the p0030 code is on for sometime and the lambda sensor ultimately fails will the car seek to go into limp mode ?

If the p0030 code is on for sometime and the lambda sensor ultimately fails will the car seek to go into limp mode ?

Depends on vehicle but more than likely yes, especially a turbo.

Been putting it off and foot down on the bypass today and zero boost. Runs a bit lumpy below 2k and Eml flashes. Only code is the 30 and 35 so I am thinking it has finally died. Mk1 vRS Occy:)

Edited 10 April, 201610 yr by 53Racing

I had this on mine, and it puts the car into limp mode quite spectacularly if it cant calculate fuel trims correctly.

 

For info - http://wiki.ross-tech.com/wiki/index.php/16414/P0030/000048

It does smell pretty rich lol

Maybe I should start a new topic as this is quite old. Anyway. I had the P0030 fault and was told by the SKoda WS it was probably the pre-Lambda sensor. I changed it and reset the fault code (and engine light off). It works fine until the next time I start the engine and light comes on.

 

Anything else I need to check and/or replace?