Hello skoda experts.

 

Sorry if this has been asked before. I have a mk3 Octavia and I am trying to read the error codes for a EPC error.

 

My OBD port doesn't work.

 

I know the (although cheap) reader is OK because it worked in another mk3 octavia.

 

I know the phone is OK because it worked in another mk3 octavia with that same reader.

 

I know the fuses are ok.

 

I have tried many many times in different combinations and sequences. The reader gets power and connects with the phone but can't connect properly to the car. It reads a voltage of 12 if key is turned to power and about 14-15V if engine is running.

 

I tried pushing the wires around a bit to see if it was a loose connection but it doesn't seem to help. Maybe I need to take out the socket to really investigate, how is that done?

 

I have also read that I can try resetting it by taking the negative terminal off the battery for a few minutes, but will that have other consequences for the car?

 

Thanks a lot for any advice you can provide!

1 hour ago, BDDK said:

I have also read that I can try resetting it by taking the negative terminal off the battery for a few minutes, but will that have other consequences for the car?

 

I read that Santa Claus is real!

 

It sounds like you are using a Bluetooth OBDII module as you speak of your phone, is the space around the socket sufficient to insert the much bulkier Bluetooth casing or is it tight?

 

I know you say that you have used it sucessfully on another MK3 but on the MK2 for instance a normal cabled lead would work fine but a bluetooth one was giving the same problems.

If a previous owner had used an OBD11 lead with large pins (common amongst some Chinese products) the contacts on the OBD11 socket could have opened up and not be making contact with your dongle.

It is a tight fit. But pushes in quite far and does draw power. May not connect all pins though, I'd like to pull out the socket to look closer.

 

I don't know what readers have been used on it by various mechanics.  I know it worked when I bought the car using a professional cabled reader, but that was like 4 years ago.

 

Thanks so far, fellas

My money is on the el cheapo diagnostic tool being the issue, there is a reason workshop level diagnostic tools cost £1000s.

 

Not to say yours won’t work on some modules or even some cars, but sounds like either poor hardware or poor software, what are you using for either?

I have measured the voltage of all the 7 connected pins. They all have power to them (except the two grounds, of course).

I have tried two different bluetooth OBD readers that both work in a different mk3 Octavia...

I have checked the fuses.

I have tried many many times, with different apps, different protocol settings etc..

I tried disconnecting+reconnecting the battery

Nothing's worked so far. Does anyone have any advice? i have no more ideas other than go to a mechanic and see if they can read any error codes.

Thanks

 

Whereabouts are you?

21 hours ago, Breezy_Pete said:

Whereabouts are you?

Zealand, Denmark