Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Lizzie Zoom]

So today it happened.  After driving the car half the day, it suddenly would not re-start after stopping at my daughters.

Called the AA, who arrived after 20 minutes.  A very experienced older chap carried out all the usual initial checks, then connected the diagnostics box, which showed "no fault", but that quickly led him to identify that the crank sensor was not telling the engine it was turning, confirmed by the fact that even when turning the engine the rev counter did not move.

The only sensor he had was for a Corsa, and of course it was now the evening with the main dealer shut!

So I am about to order a new crank sensor, but I have read in another post - https://www.omegaowners.com/forum/index.php?topic=148352.0
 - that you have to be very careful to get the right replacement.  I have noted the part number suggested in the thread for my 3.2, but am I right in thinking that if I give my friendly parts manager the chassis number and engine number I should get the right part?

I note the option to take the part number off the old sensor, but I do not want to get under the car more than twice

[TheBoy]

EPC is frequently wrong, so don't trust your dealer.  As you have researched, you need to go in with the PN.

You could check your connector, which will identify it.  Most V6's actually take the cheaper sensor, but not all.

[Nick W]

EPC is frequently wrong, so don't trust your dealer.  As you have researched, you need to go in with the PN.

You could check your connector, which will identify it.  Most V6's actually take the cheaper sensor, but not all.

You could use your phone to take a photo of the sensor and/or the connector without dismantling anything, or struggling to get under the car. Take enough photos until you can definitively identify the part you need.

[Lizzie Zoom]

Thanks TB and Nick.  Will take on board your suggestions

The only question Nick is the sensor is next to the oil filter housing?

[Nick W]

Thanks TB and Nick.  Will take on board your suggestions

The only question Nick is the sensor is next to the oil filter housing?

It's just above the filter.

[Lizzie Zoom]

I have re-read the previously quoted thread and noted the part number for the 3.2 V6 is shown as 90549743, but elsewhere I have found part number is quoted as 90540743.

Which one is it for an engine number of 08789xxx please?
 

Autodoc have a BOSCH sensor with the part no 90540743 for £40.80. Does that sound ok please,
Not forgetting the points made about caution in the quoted thread?

[Lizzie Zoom]

Thanks TB and Nick.  Will take on board your suggestions

The only question Nick is the sensor is next to the oil filter housing?

It's just above the filter.

Thanks Nick

[Doctor Gollum]

Only buy a genuine sensor from a genuine VX dealer that you genuinely have to walk in to.

[johnnydog]

Only buy a genuine sensor from a genuine VX dealer that you genuinely have to walk in to.

I had exactly your symptoms recently with my 2.6, so I fitted a brand new genuine VX crank sensor 90540743 that matched the Bosch no of the faulty one I removed (the replacement I had previously bought from Vauxhall), but after fitting it, it fired up and ran for a short period, but then it refused to start again ( just cranked). Ended up fitting a known used genuine Bosch sensor off one of my 3.2 breakers (which was obviously a previous replacement as I could get it off in one piece) and it has been fine since.
Although I agree totally with the sentiment about getting a genuine VX from a VX dealership, this isn't 100% foolproof as I found out! The same genuine Bosch marketed product is part no 0 261 210 131 if that helps.

[johnnydog]

I have re-read the previously quoted thread and noted the part number for the 3.2 V6 is shown as 90549743, but elsewhere I have found part number is quoted as 90540743.

Which one is it for an engine number of 08789xxx please?
 

I think the quoted GM part no 90549743 was a typo and definitely incorrect.

[Doctor Gollum]

As suggested before, you were unlucky.

Also, from an earlier thread on the subject, there's only one crank sensor option for the 2.6/3.2.

You might also be able to get a genuine one from the States from an '01 Catera 3.0*

* the last model year Catera is electronically the same as the 2.6/3.2 ie DBW. 

[Lizzie Zoom]

I have re-read the previously quoted thread and noted the part number for the 3.2 V6 is shown as 90549743, but elsewhere I have found part number is quoted as 90540743.

Which one is it for an engine number of 08789xxx please?
 

I think the quoted GM part no 90549743 was a typo and definitely incorrect.

Thanks johnnydog for both of your posts and I am buying, hopefully, both a Bosch and Vx sensor for belt and braces!!

The part No, with '9' in it I thought was suspicious, so thanks for clearing that up.

[Lizzie Zoom]

Only buy a genuine sensor from a genuine VX dealer that you genuinely have to walk in to.

Thanks DG.  Yes, I am going down the route of getting that and a Bosch for luck!

UPDATE :  My Vx dealer has just informed me that part no. 90540743 is now discontinued so no longer available.

               I think this is going to be a problem for all Omega Vx parts now

So back to the Bosch alternative.

[Lizzie Zoom]

Bloody cars!!!

Why do they do this to us?!

Went to my daughters today expecting to get the AA to tow my car back to my address, but on the off chance I turned the ignition and she fired up straight away with the rev counter again confirming it recognised the engine turning!!  Great, but what will happen next?

Obviously this morning the engine was cold, and even the AA guy said she may start as she did.  But why?  Was it anything to do with filling the tank two hours before she ceased to re-start?

I am still buying the Autodoc Bosch sensor, and as a matter of research to get ready for replacing it as necessary, and beyond understanding the OOF thread I quoted, I have delved around at the top back end of the engine and managed to pull up the connector in my photo below.  I take it this is the crank sensor connector mentioned in the article with the photo, so at least I know how to successfully reach this plug for any further work




But how long before she will not start again?

[omegod]

She will wait for the most awkward moment and leave you stranded in the middle of a huge junction, well mine did anyway  Mine would restart once stone cold again