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Author Topic: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?  (Read 7464 times)

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Doctor Gollum

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #15 on: 04 November 2018, 03:39:10 »

Bought this car today, MOT failure, engine light on, and cannot find the OBD2 socket.
Please read the manual... Oh wait, you can't because it is wedged in the glovebox.  ::)
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Lazydocker

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #16 on: 04 November 2018, 09:38:48 »

You can do the pedal trick too ;)
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TheBoy

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #17 on: 04 November 2018, 09:45:08 »

Re the Beemer, as have been mentioned, its only post 2001 for petrols and post 2003 for diesels that European sold cars had to be EOBD (Euro form of OBDII, virtually identical, but sometimes enough to confuddle crap code readers).

EOBD includes socket spec, protocol specs, and socket location (within 1m of the steering wheel, in the cabin).

Obviously, the manufacturers were aware of this spec coming into force, so most put the socket in place earlier, when a new model/refresh was launched. Some, such as Rover, did not enable EOBD on the actual ECU until the date it came in though.

Pre EOBD fuel injected/engine management cars usually had some kind of diagnostics capability, but the socket could be whatever and wherever the manufacturer chose.
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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #18 on: 04 November 2018, 18:41:46 »

Must be within reach of the driver by regulation...

Really? On my BMW it's under the bonnet.  :-\

Is it OBD I or OBD II though?

Good question!  Given that it has rudely been described as Victorian by our aristocratic member from Lincolnshire, it might be OBDI.  :-\

It has a big round plug and I have to use an adapter to use my code reader.  :)

Your Beemer probably has both types of diagnostic socket,the one under dash is the modern type but probably only good for engine diagnostics,the big round one under bonnet for all the other systems  :y
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terry paget

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #19 on: 04 November 2018, 19:29:48 »

No worries......o2 sensor?
I suspect so. My cheapo reader said 'Lean mixture bank one'. The car has 2 lambda sensors, so could be either. I cancelled the code and it has not reappeared yet, but I cannot go far until I get an MOT certificate.
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dave the builder

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #20 on: 04 November 2018, 19:49:27 »

No worries......o2 sensor?
I suspect so. My cheapo reader said 'Lean mixture bank one'. The car has 2 lambda sensors, so could be either. I cancelled the code and it has not reappeared yet, but I cannot go far until I get an MOT certificate.
check you have no blows /leaks on the exhaust  :y
did it fail on lambda ?
what other jobs ?
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Webby the Bear

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #21 on: 04 November 2018, 20:12:04 »

If it failed on lambda it would more than likely be a decent sized exhaust leak
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Nick W

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #22 on: 04 November 2018, 20:23:20 »

No worries......o2 sensor?
I suspect so. My cheapo reader said 'Lean mixture bank one'. The car has 2 lambda sensors, so could be either. I cancelled the code and it has not reappeared yet, but I cannot go far until I get an MOT certificate.


Once again, that does not necessarily mean that the lambda sensor is the fault. Whats more likely is that the sensor is reporting a fault further up the system. Changing the sensor will not fix the fault.


Reading the codes is just the start of the diagnostic procedure.
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terry paget

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #23 on: 04 November 2018, 20:23:39 »

No worries......o2 sensor?
I suspect so. My cheapo reader said 'Lean mixture bank one'. The car has 2 lambda sensors, so could be either. I cancelled the code and it has not reappeared yet, but I cannot go far until I get an MOT certificate.
check you have no blows /leaks on the exhaust  :y
did it fail on lambda ?
what other jobs ?
It clearly passed on emissions, it failed MOT on engine light on, which I did not not think was a failing matter. It also failed on horn not working, LH side light not working, and both rear discs seriously worn. The horn now works, I have changed the sidelight bulb, the rear discs don't look bad to me but I have ordered new on e-bay, and the engine light is off at the moment. This car is the spare, so I can, in my own time,  change the oil and filter, cambelt and water pump. It's novel to work on a car with no rust, and immaculate externally! My son Jonny is very pleased with his Astra, I shall change his cam belt when I have sorted this car.
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dave the builder

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #24 on: 04 November 2018, 20:35:26 »

It would be money well spent to get a code reader interface that gives live data and vauxhall specific codes , I think you know the one we're NOT talking about  ;)

is this 2004 a late G or early H ?
I do like the simplicity of astra to work on
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Webby the Bear

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #25 on: 04 November 2018, 21:00:08 »

Brake discs have got to be stupidly bad to fail. There is a tester I know (not my garage) that pretty much fails discs on every mot. I don’t think he understands the term ‘minimum standard’
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terry paget

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #26 on: 04 November 2018, 22:03:14 »

Brake discs have got to be stupidly bad to fail. There is a tester I know (not my garage) that pretty much fails discs on every mot. I don’t think he understands the term ‘minimum standard’
I agree, but will a different tester pass the car if he is aware it has failed before on brake discs? I have seen the MOT testers guide , and 'pass and advise' is all these discs warrant.
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terry paget

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #27 on: 04 November 2018, 22:35:36 »

Here's the disc.

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Webby the Bear

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #28 on: 05 November 2018, 06:47:29 »

You are absolutely right mate. If u go back to the same place they’ll want to see the discs done. Just do them and be done.  :y
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terry paget

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Re: Where is the OBD2 socket on a 2004 Astra 1.6 petrol?
« Reply #29 on: 05 November 2018, 07:29:29 »

It would be money well spent to get a code reader interface that gives live data and vauxhall specific codes , I think you know the one we're NOT talking about  ;)

is this 2004 a late G or early H ?
I do like the simplicity of astra to work on
G or H, I don't know. Engine code is Z16XEP. You tell me.
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