Rudolf Posted December 13, 2020 Report Share Posted December 13, 2020 Transmission problems. Any advice is welcomed! Hey guys, VW Lupo 1.2tdi 3L 2001. owner here. I have run into some transmission problems. I was overtaking a car on the road and the Lupo performed kick down from gear 4 to gear 3, and seamed ir chuld not find the gear. The gears in the panel flashed between each other and the car went into SAFETY MODE? I can turn on the engine but the accelerator pedal is unresponsive. And the lights by gears stick are flashing "+" "-" "D" "N" both when in tiptronic or automatic. When turning ignition but not starting engine, switching gears in tiptronic mode shows in dashboard but i can hear that the car is not switching gears. My friend pulled me home from midle of road. Assessments: VCDS shows: 01605 Potentiometer 2 for gear recognition (G240) Basic setting stops after the 28 step shifts and writes RTFM! with same error (First time I have done basic settings for the car) Checked wiering from potentiometer 2 to gerbox ECU with beeping tester, all 3 wires test oky. Gear selector rod has small movment in top ball head Prior to incident Pressure Accumulator made 6 gear changes before starting the pump. Oil level is good. History: Before this incident, the car already had a faulty 5 gear, first 4 gears worked perfectly fine but when switched into 5th, the car in couple secs went into safety mode. Afrer switching ignition off and on chuld use first 4 gear perfectly fine again but not the 5th. Mechanics in my area doesn't understand the 1.2 3l transmission, so i only used the first 4 gears but now the car doesn't work so I will try to figure the problem out myself. Any advice on what else shuld i test or what chuld be the problem? Faulty top potentiometer is the obvious answer but do they break and how can I test it befor paying the €€€ Whuld switching potentiometer 1 and 2 with places resort in the error code changing from g240 to g239? Quote Link to comment Share on other sites More sharing options...
mk2 Posted December 13, 2020 Report Share Posted December 13, 2020 @RAB knows the answer. RAB this is asked a lot. Any chance you could be a hero and write a quick "how to" for everyone? I never ever hear of any 3L engine issues, but gearbox questions are always coming up. Usually loss of gear selection or just plain limp mode. Quote Link to comment Share on other sites More sharing options...
RAB Posted December 18, 2020 Report Share Posted December 18, 2020 Already answered: https://www.a2oc.net/community/index.php?threads/1-2tdi-3l-transmission-problems.45281/ A "How To" on what? There are many causes of gearbox problems, a major one being lack of proactive maintenance! For this one, it's probably a sensor pot failure which is not very common. RAB Quote Link to comment Share on other sites More sharing options...
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