Hi folks,

Bit new to the VCDS world but have attached my recent log for 2013 Octavia VRS 2.0 diesel.

Few faults coming up causing check engine warning light that i need to remove to pass cars annual test.

Couple look ok, glow plug (P0671) will be replaced and that should be that.

The oxygen sensor (P2237) i need to order, which i hope may resolve that fault. i believe its the one pre cat near the bulkhead inside the engine bay? i have seen a few videos where they use VCDS to code the new one at install? i presume that is needed and should be followed.

i will worry about the fuel pressure regulation fault (P1065) afterwards.

Not sure what all the bulb faults are? Replaced both D3S bulbs fine the other week, not sure how it could be related, maybe coincidental and bad earth? Faults also for headlamp low beam that haven't cleared?

Last but not least, Rain and light sensor faults, cant code them out i understand, how to resole that??

Need to keep bright green VRS going, love her to bits.

Thanks for any words of wisdom or advice, cheers.

Log-132OY690-TMBBK7NE1E0103256-298328km-185372mi.txt

Last but not least, Rain and light sensor faults, cant code them out i understand, how to resole that??

Are they working as they should.

Have you tried clearing the code?

2 hours ago, TheClient said:

Last but not least, Rain and light sensor faults, cant code them out i understand, how to resole that??

Are they working as they should.

Have you tried clearing the code?

No not working, clear code but comes back, apparently cannot code them out. Don't use the feature or want them but cannot remove and causes dashboard light. Thanks

Couple look ok, glow plug (P0671) will be replaced and that should be that.

Well bizarrely, got multimeter on all glow plugs whilst still installed expecting glow plug 1 to have failed with no continuity but readings all the same?? What else could the code be for? Should i exchange glow plug 1 with a new Bosch one regardless? Thanks for any advice.

Can i also ask the experts here, what triggers engine check dashboard light? Is it the 'Fault Priority' (whats the range and which is the worst?) or 'Fault Frequency' or a combination of both? Thanks.

4984 - Cylinder 1 Glow Plug Circuit (Q10) 

          P0671 00 [10101111] - Electrical Fault

          MIL ON - Confirmed - Tested Since Memory Clear

             Freeze Frame:

                    Fault Priority: 2

                    Fault Frequency: 1

                    Mileage: 295399 km

                    Date: 2024.12.04

                    Time: 08:28:45

                    Engine RPM: 297.00 /min

                    Normed load value: 100.0 %

                    Vehicle speed: 0 km/h

                    Coolant temperature: 12 °C

                    Intake air temperature: 12 °C

                    Ambient air pressure: 1000 mbar

                    Voltage terminal 30: 9.980 V

                    Unlearning counter according OBD: 40

                    Electric auxiliary heater: shut-off conditions-Bits 0-7: 0

                    Electric auxiliary heater: shut-off conditions-Bits 0-7: 0

                    Electric auxiliary heater: relay activation-Bits 0-7: 0

                    Pre-glow time: 2000 ms

                    Glow status-Bits 0-7: 0

                    Glow status-Bits 0-7: 0

                    Glow cycles above temperature threshold-Bits 0-7: 0

                    Glow cycles above temperature threshold-Bits 0-7: 17

                    Glow cycles below temperature threshold-Bits 0-7: 0

                    Glow cycles below temperature threshold-Bits 0-7: 4

                    Outside temperature sensor 1: B1: raw value: 10.0 °C

Glow plug mystery solved. Took out glow plug 1 and 2 and put multi meter on them both, cylinder 2 fine but cylinder 1 with circuit error was near dead, still some continuity but not much. Hence the DTC code and circuit error, too much resistance in glow plug flagged P0671 circuit error. Put 2 in cylinder 1 and new Bosch in cylinder 2. Cleared codes and wee spin and now no code. Good stuff. Can't explain why i couldn't capture this with a multimeter when it was in the head but dead obvious when out.

Glad that you have got it sorted. When I had a glowplug error on my Mk 2 Octavia I measured the resistances whilst they were installed. Three read 0.5 ohm and the faulty one was 43.3 ohm. I did actually change them all as I figured if one had gone then the rest would follow.