8 replies to this topic

[Robski]

First of all I'm sorry to be posting a thread with this title as I know it has been discussed loads! However, I'm struggling to find clear answers on the advantages / disadvantages of each of these bits of kit. Hopefully you chaps will be able to confirm my understanding of the options available and this will also serve to be a clear(er) thread for others looking into buying these bits of kit.

First of all, this is my understanding of each device:

OPCOM
This is a device which plugs into the port under the dash and is then plugged into a laptop. It provides the most comprehensive diagnostic information and fault code clearing available other than a Tech2 device as used by dealers. This device will also allow new keys to be coded to the immobiliser.

OBDii reader
This is a stand-alone device which plugs into the port under the dash. It provides the majority of the functionality of OPCOM with regard to fault code reading and clearing but will not be able to code new keys to the car's immobiliser.

Scangauge
This is another standalone device designed to be mounted (semi) permanently in the car. Again it connects to the port under the dash and has a small lcd screen which can display various parameters from the ECU. When used on an NA VX it can also be used to manually override the radiator fan. It can also be used to clear fault codes.

IF my understanding is correct then:

-The OPCOM is the most functional device but requires a laptop making it the least practical. It is the only way to code new keys to the immobiliser.

-The stand-alone OBDii scanner is a tool for reading / clearing fault codes.

-The Scangauge is the most practical to use on a day to day basis as it is generally installed on a (semi) permanent basis and provides the driver with realtime information whilst on the road as well as diagnostic / fault clearing functions when required.

Is this correct?

I need to code an additional key to my car as I seem to have hidden one of them in a very secret place which I have now forgotten! Therefore I think I need an OPCOM. The practical functionality of the Scangauge also attracts me as it seems like a useful addition for the driver.

I know there are other devices which will connect to an Android phone via bluetooth and give similar information to the scangauge but I'd like to keep this thread limited to the devices above.

Now, if some of you more technically focused folks could tell me how wrong my assumptions are I'd very much appreciate it!

Thanks in advance.

R

[techieboy]

Is this correct?

Spot on.

I have all three. Well a couple more than that in reality. Good to cover all the options.

OP-COM (PC only, if that's an issue) also allows you to interact with the ABS ECU and the airbag controller, which the other two options don't allow.

The other two options are universal and will work on any OBD-II equipped car. OP-COM is only any good on Vauxhall.

[Robski]

Superb! Thanks for that and hopefully this thread will clear things up for other old fashioned folks like me!!! I think I'll be ordering an OPCOM and Scangauge when I get back to the UK. R

Edited by Robski, 04 October 2012 - 07:21 PM.

[JohnTurbo]

You can also get an OBDii reader which will work with your phone via bluetooth (at least it will for an android phone). ("ELM327 Bluetooth Torque" - these search terms would find you one on ebay) This basically gives you something similar in functionality to a scangauge.

[Robski]

Thanks John, I have heard of those and mentioned them in the original post but I'd personally prefer to stick with more 'dedicated' devices. Each to their own though and I'm sure they would be ideal solutions for many folks out there!

[JohnTurbo]

My apologies, my short attention span must have expired before your closing paragraph so missed that! I also have Opcom, a laptop based ELM327, and an older ELM323. Opcom is a must have tbh, especially because it also works with my GM Saab.

[Robski]

My apologies, my short attention span must have expired before your closing paragraph so missed that!

I also have Opcom, a laptop based ELM327, and an older ELM323. Opcom is a must have tbh, especially because it also works with my GM Saab.

No worries fella!
However, now that you've mentioned ELM327 & ELM323 I'm not quite as sure where I stand!

The item I'm looking at is on Amazon:
http://www.amazon.co...a/dp/B008IGIOJC

There doesn't seem to be any mention of either ELM number?

R

[JohnTurbo]

ELM isn't relevant to opcom. - For an OBDii reader it relates to communications protocols I think, where a 327 is needed for canbus. - Just a guess though.

[Robski]