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Author Topic: Vauxhall expert  (Read 3003 times)

Rog-from-Bix

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Re: Vauxhall expert
« Reply #15 on: November 30, 2020, 08:39:34 PM »
Quote from: Klaxon on November 30, 2020, 07:34:36 PM
Sodding light came back on......
Got the look from SHMBO.....
Its going for fixing on Thursday.
I tried I really tried..... :thud

Unfortunately turning the light off and fixing the fault are not one and the same as you have found
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diffwhine

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Re: Vauxhall expert
« Reply #16 on: November 30, 2020, 10:00:53 PM »
It looks like you've fallen foul of the textbook action of clearing the fault code without working out what it was! You are not alone! Join the line of main dealers who repeatedly do this!
Its Powertrain, so the fault will most likely be a P Code (P prefixed). You need that code to start with and your scanner should have shown you that. Post it and we may be able to help. On EU vehicles, a MIL (malfunction indicator light) will be flagged and will always re-occur for any emissions related fault on the engine until the fault is rectified (legal requirement). If it's emissions related, it will be a standard generic P code. Chances are that its something simple like a dodgy oxygen sensor or an EVAPS fault, but without the code to start from, there's not much that can be done to help. Don't thrash it - its a common misconception that this will "clean it out". Occasionally that works, but if there is something mechanically wrong, you will only make things worse.
If it runs well, its probably nothing too sinister.
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diffwhine

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Re: Vauxhall expert
« Reply #17 on: November 30, 2020, 10:03:23 PM »
But I'm not a Vauxhall expert, but having been a Land Rover technical instructor for more years than I care to admit, I know a bit about the process even if I'm not familiar with the system. Also it may be a known issue - search under Opel as well as Vauxhall - you'll get more hits.
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Klaxon

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Re: Vauxhall expert
« Reply #18 on: December 01, 2020, 08:22:42 PM »
Fault codes==
P0138 O2 SENSOR CIRCUIT HIGH BANK 1 SENSOR 2
P0140 O2 SENSOR NO ACTIVITY DETECTED BANK 1 SENSOR 2

Looks like an o2 sensor is kaputt!
if it was my car I would replace both sensors and default the codes BUT its not mine  (I have a suspicion i'll be paying for it, HAHA).
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geoff

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Re: Vauxhall expert
« Reply #19 on: December 01, 2020, 09:11:03 PM »

Thanks for the reply re codes  :cheers
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diffwhine

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Re: Vauxhall expert
« Reply #20 on: December 01, 2020, 09:27:46 PM »
How's that for a diagnosis! Rather pleased with myself on that one!
Seriously though - good news. I don't know the Vauxhall system, but many modern systems have two O2 sensors - one before and one after the catalyst. Some Googling should give you an idea what's required
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