Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: dopey on 29 December 2009, 11:05:55

Title: Lambda sensor location
Post by: dopey on 29 December 2009, 11:05:55

Guys

My car has died over night (yet again).

Same issue as before, engine turns over, runs for a few seconds then just gets rougher and rougher until stalling.

Checked the fault codes and its stating that its the fuel trim.

Recently had a garage replace the crank sensor and coil packs.  They also said that the lambda sensor wires were loose, and reconnected them.

Wanted to just check they hadn't come loose again, so at the risk of sounding daft, where is the lambda sensor and the connecting plug located?

Cheers

Title: Re: Lambda sensor location
Post by: TheBoy on 29 December 2009, 13:37:55

4 lamdas on your car.

Before 'guessing' the problem, and potentially adding new faults, do a 'Pedal Trick' (search the Maintenence Guides for how to do this) to see if any codes stored :)

Title: Re: Lambda sensor location
Post by: dopey on 29 December 2009, 15:53:34

aye - i got 170 and 173 which both appear to be fuel trim errors on a 2.6 V6.

4 sensors!!!

Thats it, i'm just going to use my bike instead, don't think it knows what sensors are (other than oil pressure), though boot space is limited. 

Title: Re: Lambda sensor location
Post by: Proz on 29 December 2009, 15:56:00

I was getting the P0170 code for fuel trim on my 2.2 .... turned out it was the Maf sensor  :-/

Title: Re: Lambda sensor location
Post by: dopey on 29 December 2009, 16:19:08

MAF was going to be next on the list.  Was just wanting to check Lambda sensor as have been informed by garage  that one has a loose connection (wishful thinking probably).

This car seems to be a friday afternoon car!! >:(

Not sure whether it helps or not, but the car was running fine (at least for the last month), then I left the road side lights on for a few nights in v v cold weather, which flattened the battery.  Charged battery back up and car was rough as a badgers arse again.

Is a temporarily flattened battery likely to bugger anything else up, or is it likely to be a conicidence?

Title: Re: Lambda sensor location
Post by: Entwood on 29 December 2009, 17:19:00

I wonder if the garage have "crossed" the lamda's ?? if they have the poor ECU is going to be going nuts trying to trim the "wrong" bank .. every action will get worse not better .....  :(

Just a thought ???

Title: Re: Lambda sensor location
Post by: unlucky mark mv6 on 29 December 2009, 17:38:44

Quote

I wonder if the garage have "crossed" the lamda's ?? if they have the poor ECU is going to be going nuts trying to trim the "wrong" bank .. every action will get worse not better .....  :(

Just a thought ???

Me personally wouldent trust any garage with my car. :-/

Title: Re: Lambda sensor location
Post by: dopey on 29 December 2009, 18:12:27

so where abouts are the sensors and connections?

Title: Re: Lambda sensor location
Post by: dbug on 29 December 2009, 19:38:48

Disconnect MAF sensor - if it starts ok and revs thats your problem!! 

Title: Re: Lambda sensor location
Post by: TheBoy on 29 December 2009, 20:41:14

On each bank, there is one before and one after the precat (which is before the main cat)

Title: Re: Lambda sensor location
Post by: dopey on 29 December 2009, 20:57:51

Cheers for that.

Are they fairly easy to access or is it a 'drop lots of things off' type excercise?

Title: Re: Lambda sensor location
Post by: dopey on 30 December 2009, 10:55:44

dbug - your a genius!

Unplugged MAF, car worked.
Plugged back in - knackered.
Unplugged again - works perfectly!!

Just off to get a new one now.

Cheers again guys. :y