Vauxhall Corsa D – Car Won’t Start After Flat Battery – Immobilised – P1632 / P1678 / P1679 / B3114 / B3925 / B3929 / B3977

Vauxhall Corsa D – Car Won’t Start After Flat Battery – Immobilised – P1632 / P1678 / P1679 / B3114 / B3925 / B3929 / B3977

Vauxhall Corsa D – Car Won’t Start After Flat Battery – Immobilised – P1632 / P1678 / P1679 / B3114 / B3925 / B3929 / B3977


NOTE 1: Please check our  ‘areas covered’ page to see if you fall within our catchment area. We do not travel outside of this set area. Customers outside this area must arrange recovery to Westerham, Kent if they would like us to fix their vehicle.

NOTE 2: The only vehicle affected by the below issue is the Corsa D. No other vehicle in the Vauxhall range is affected. 

The Vauxhall Corsa D was made between 2006 and 2014, the problem I’m about to describe usually only affects the vehicles made in the earlier years of this time period (up to around 2009).

What are the symptoms of this fault?

The car will not start. You will also notice a flashing light on the dash – a car with a spanner through the centre (see picture below).


The car will also store some or all of the following fault codes:

P1632 – Wrong Transponder Key
P1678 – ECM (Engine Control Module) Identification Failed
P1679 – Wrong Environment Identifier Received BCM (Body Control Module)
B3114 – Remote Key Not Synchronized
B3925 – Wrong Environment Identifier Received IPC (Instrument Cluster)
B3929 – Wrong Environment Identifier Received SDM (Airbag)
B3977 – Wrong Environment Identifier Received ECM (Engine Control Module)

When does the fault occur?

This fault occurs when attempting to start the vehicle with a flat battery.

What does the fault mean?

When attempting to start the vehicle with a flat battery the BCM (Body Control Module) has insufficient power to perform it’s functions and the data held on this module corrupts. Now, with the data corrupted, it can no longer communicate correctly with the other modules in the car – it see’s the BCM as an ‘unmatched part’ and considers this a security risk – the vehicle is now immobilsed.

BCM – The Body Control Module is responsible for multiple functions on the vehicle  – immobiliser, remote central locking, windscreen wipers, headlights, indicators etc…

ECM – The Engine Control Module is responsible for monitoring and controlling all major aspects of your engine – fuel, air, ignition etc…

IPC – The Instrument Cluster contains your speedometer, rev counter and dash warning lights (the part behind your steering wheel).

SDM – The Airbag Module is a safety module controlling your airbags.

How do I fix the problem?

Genuine Tech 2 Vauxhall diagnostics are needed to fix this issue. The BCM (Body Control Module) must be reset and reprogrammed to match the other security modules within the vehicle.

Does my car need to go to the main dealers?

No! We have genuine Tech 2 diagnostics and can fix this problem for you in no time at all. We have fixed this common problem many times already.

How much does it cost?

We charge a flat rate of £120 for this service (see areas covered page). No hidden costs. Please feel free to give us a ring!

27 thoughts on “Vauxhall Corsa D – Car Won’t Start After Flat Battery – Immobilised – P1632 / P1678 / P1679 / B3114 / B3925 / B3929 / B3977

    1. Autolox Post author

      Hi Ali. Please check our ‘areas covered’ page to see if we cover your location. If you are in our area then we will happily fix your issue – just give us a call to book an appointment. Many thanks, Autolox.

  1. Rafael

    Hi there… I live in bournemouth, i know i’m outside of your work area but do you know or recommend someone who can do it? As im having exacly the same codes as you state and the car won’t enen crank over

  2. Shaun

    Hi I have this problem too with my Vauxhall Corsa 1.4 SXI 2008, my central locking, lights, wipers etc still work, it just won’t turn over.. I have had new battery fitted.. Same problem, I did try start the car on flat battery and the flashing spanner light comes up, would this be the BCM?

  3. Shaun

    Okay thanks I just wasn’t sure as it says the BCM is responsible for locks, wipers etc.. Taking it to a place tommorow hopefully won’t have to go to Vauxhall, any idea how much the dealer would charge? Many thanks

    1. Autolox Post author

      You are correct in thinking the BCM is responsible for those other features – although they are not affected by the issue described. Vauxhall SHOULD charge around £150 although I have had reports of them charging extortionate amounts to ‘diagnose the issue’.

  4. Shaun

    That was the problem, all sorted now I did need my Vauxhall car pass code details which Vauxhall asked for £35 and could take 2 days to receive, I got them through an online supplier for £25 within a few hours!

  5. Hassan

    Hi there iv got a Vauxhall Corsa CDTI 1.3 2009 did start when I brought it but went off tryed starting it but the battery went flat so replaced the battery did start but cuts out when spanner light came on but now not even turning over iv got spanner light on and battery light on and says F symbol by the mileage dont know what that stand for but not even turning over now click noise by the fuse box do you think I need to reprogramme it or somethink I’m in Birmingham

  6. Ranj

    My 2008 1.3 , when I turn key not turning over just dead like battery completely flat? When I turn the key all the way the red battery light disappears, when I release key it comes back?? Radio and all other things are working but it’s just dead like an immobileser has kicked in
    Ecu or bcm?

    1. Autolox Post author

      Hi Ranj,

      This is not an immobiliser / BCM issue. You need to trace the missing 12v feed from the starter back to see where the issue lies. It could potentially be an ECU problem but you must first confirm this with the aid of a wiring diagram.

    2. Yousuf

      My 2008 1.4 , had a flat battery and had it jumped started when I turn key not turning over and had immobiliser light flashing . When I turn the key all the way the red battery light disappears, when I release key it comes back . The codes were P1632 P1678 P1679 . Do you reckon I need to reprogram key and wht about the ECU and bcm thanks

      1. Autolox Post author

        Hi Yousuf,

        It seems like you have the issue described above. If you are in our catchment area then please contact us or alternatively get the vehicle recovered to the main dealers.

  7. Malik

    Hi ,
    My corsa 2007 reg battery was flat for more than a month and I changed with new battery ! After changing with new battery red battery sign and a car with a spanner through the centre are showing on screen ! And it is not Turning the ignition but radio or other light are working fine ! Can you help me what is this and why it is happening and if you can help by fixing it ? Thanks

    1. Autolox Post author

      Hi Chris,

      Unfortunately, Bridgewater is outside of our catchment area. I suggest finding someone more local to you. If you really get stuck then feel free to arrange recovery to us and we will fix the issue.

    1. Autolox Post author

      Hi Jose,

      In it’s normal state the car/spanner light should be solid. You do not have the issue described in this blog. I suggest you get the vehicle looked at by a professional to diagnose your issue.

  8. john c

    i have corsa 1.3cdti 2009 model ecoflex .
    which was left for a couple of weeks , and it wouldnt start, not even turn over , all dash lights work, radio,etc. so i put it on op com and it come up with fault p0685-01 main relay circuit high voltage. part number 555683883 , which comes up as ecu, so i sent of ecu to be repaired as i was informed they suffer water damage. ive had ecu back but car the same , so when i plugged op-com in to source problem it came up with it couldnt no communication with ecu now , all what happens now is that f comes up on dash, spanner light is on , and weirdly of all the engine cooling fan stays on now .
    anyone have a clue

    1. Autolox Post author

      Hi John,

      Usually, this issue can be resolved by a simple battery reset. I’m concerned that the ‘ECU repair’ has done more harm than good. The vehicle needs to be recovered to a Vauxhall specialist.

  9. Robert

    Hi there,

    I have Corsa SXI 1.3 Ecoflex that was not used for over 7 weeks and I cant even unlock the vehicle. Drivers side lock does not react when trying to unlock with ket mechanically. Is there any solution to this?
    Car is in London Islington.

    1. Autolox Post author

      Hi Robert

      First of all try changing the battery in your remote. If this has no effect then spray GT85 into the door lock several times – then try the key again. It will help if you wiggle the key up and down whilst trying to turn it.

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