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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.

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

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.

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

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

Many thanks for that, i'll order way as std lighting for reversing is really bad.

Anyone got a recent recommendation for reversing bulbs and rear indicator bulbs with a link? Straight swap, much brighter and non canbus errors please. Many thanks.

Many thanks, this glovebox one straight swap no mods needed? Good bit brighter alright.

Hi folks, newbie alert. Took delivery of a 2017 2.0 TDI Superb Combi. Very pleased overall. Reversed the other night and assumed a fuse had gone and reversing lights weren't working...to my alarm they were working but just very inadequate. That brought a google search on and read with interest most of the 28 pages on this topic. Obviously old news to lots of you who have had the car since 2016-17 so apologies for that. What i am looking for is a strong recommendation for replacement reversing lights as a lot of the links aren't working. Obviously no canbus errors. Whilst i am in the rear lights i might as well do the indicators too. The boot lights seem very simple with items in aliexpress? just wondering about any issues with these? Appreciate they don't fit the glovebox without mods. What about simple replacement W5W bulbs? Thanks again for any advice, much appreciated.