Hi all, new to this so give me a chance...
Just brought a 2014 Audi A3 1.8TFSI. It’s got 57k miles on it and is cat n. It’s also running big power - bigger turbo intercooler turbo back exhaust etc etc (360bhp ((180bhp standard)) ) Found out that the gearbox has been replaced with a 7 speed 2016 gearbox code RRF (car should have PYV). According to TPS either box is fine for the car but apparently the mechatronics is not meant for the car (Need to get part number and code for this) The gear box fitted has a sensor zip tied to it which is the gearbox speed sensor. They have done this as the gearbox has no cutout for the sensor to be placed in... I have no warning lights on the dash but a lot of fault codes come up when it’s plugged in (will post codes below) and when driving normally the gearbox is fine however when you put your foot down it often won’t change gear, usually revs to around 4k and then it’s as if you are hitting a rev limiter it just won’t shift up until you completely let off. Then when you put your foot down again it will rev out shift up and then tend to do the same in the next gear however strangely sometimes it shifts with no issues at all. My garage is telling me to change the mechatronics unit to correct one however the part alone is £1400 and I didn’t even bother to ask for a labour quote. I have no idea what the best way of going about this is or how to fix the issue hence coming here for advice. I was wondering if maybe there is a way of mapping the sensor out as if they make the gearbox without the sensor hole they must run fine without one?
Any advice or pointers in the right direction is massively appreciated! Fault codes to follow most relevant ones being at the bottom G240 and G28 sensors
DETAILED ECU INFO
CAN network gateway
Part #: 5Q0907530Q
Component: GW MQB High
Coding: 030100042F085A005B0002481C0B00000001000000000000000000000000 (hex)
Fault codes:
197175 Manufacturer-specific code
Central electronics
Part #: 5Q0937084AH
Component: BCM MQBAB M+
Coding: 07051C42C25106FD038C5004B31407A80800000000000000000000000000 (hex)
Fault codes:
526359 Manufacturer-specific code
Steering wheel
Part #: 8V0953521CH
Component: Lenks. Modul
Coding: A418 (hex)
[No fault codes]
Parking/steering assist
Part #: 5Q0919283B
Component: PARKHILFE 4K
Coding: 0000050011 (hex)
[No fault codes]
Airbags
Part #: 5Q0959655N
Component: AirbagVW20
Coding: 98CCC0000C0000005C5400CA00C800000065 (hex)
[No fault codes]
Instrument cluster
Part #: 8V0920970M
Component: KOMBI
Coding: 27AD0918228026000100FA00100000 (hex)
Fault codes:
13636608 Manufacturer-specific code
ABS
Part #: 5Q0907379AA
Component: ESC
Coding: 12F18AA234242A6F0178060641CC2948512C5480608294F4024100080608 (hex)
[No fault codes]
Power steering
Part #: 5Q0909144P
Component: EPS_MQB_ZFLS
Coding: 8103 (hex)
[No fault codes]
Ignition authorization
Part #: 5Q0959435A
Component: VWKESSYMQB
Coding: 030C0C (hex)
[No fault codes]
Steering column lock
Part #: 5Q0905861A
Component: ELV-MQBA
Coding: 5D00000000000000 (hex)
[No fault codes]
Heater & air conditioning
Part #: 8V0820043C
Component: AC Automat
Coding: 03100004000000011000000000001100 (hex)
[No fault codes]
Front passenger's door
Part #: 5Q0959592B
Component: TSG BFS
Coding: 001086205E01040000001002 (hex)
[No fault codes]
Driver's door
Part #: 5Q0959593B
Component: TSG FS
Coding: 00108E205C01040000001002 (hex)
[No fault codes]
Headlight aiming
Part #: 7P6907357C
Component: AFS-ECU
Coding: 011E00002B230200 (hex)
[No fault codes]
Transmission
Part #: 0CW300046C
Component: GSG DQ200-MQB
Coding: 0014 (hex)
Fault codes:
10657 Manufacturer-specific code
Engine
Part #: 8V0906264B
Component: 1.8l R4 TFSI
Coding: 0A2500322424010B3000 (hex)
Fault codes:
15377 Manufacturer-specific code
Infotainment system
Part #: 8V0035020C
Component: MU-H-ND-EU
Coding: 01730301FF00000021111101000A00002F02010701000100DE (hex)
Fault codes:
01584 Vehicle too low, pump up started
01585 Contact switch lockcylinder front seat passenger side (F242), open
01586 Contact switch lockcylinder passenger side (F242). close
01587 Igniter 2 for Airbag; Drivers Side (N250)
01588 Igniter for Head-Airbag, Drivers Side (N251)
01589 Igniter for Head-Airbag, Passenger Side (N252)
01590 Igniter for interruption battery (N253)
01593 Heated Windshield (Z2)
01592 Air Quality Sensor (G238)
01595 Type pressure control button (E226)
01591 Warning lamp for Airbag out, Driversside (K144)
01605 Potentiometer 2 for gear recognition (G240)
00513 Engine Speed Sensor (G28)
Obtained with Carista
