Audi A3 8v 1.8tfsi gearbox issues

[Law6on]

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