3.0TDI with MAP / Manifold sensor faults P0237 / P0299 (CDUC)

[Scott325SE]

Hi folks.
I recently bought an A4 Avant for my other half, which is carrying the CDUC engine code.

Last week it gave me the glow-plug dashboard light and went into limp mode. I got it home and put VCDS on it, which gave me a generic G31 fault code which pointed me to MAP sensor behind the headlight. My apologies but I neglected to save the DTCs exact Pxxx fault code. ANYWAY, new MAP sensor required please. Fair enough.

Fitted New MAP sensor this morning, took it for a drive and it's throwing me a code again:
Now, please be gentle with me, I have VCDS but I don't know my way around it - I use it almost exclusively to replace rear brakes! So any advice will need to be written for an utter ****** (me, in this case). But if anybody can point me in likely directions for the below, I'd be so unbelievably grateful!

Sunday,08,May,2022,13:49:15:27913
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.9.1.0 (x64)
Data version: 20190114 DS296.0
www.Ross-Tech.com
VIN: WAUZZZ8K8FAxxxxx
Mileage: 102440km-63653mi

Chassis Type: 8K-AU48 (8R0)
Scan: 01 02 03 05 08 09 13 14 15 16 17 19 20 2E 42 44 46 47 52 53
56 62 69 6D 72 77

VIN: WAUZZZ8K8FAxxxx Mileage: 102440km-63653miles
-------------------------------------------------------------------------------
Address 01: Engine (J623-CDUC) Labels:. 059-907-401-V2.clb
Part No SW: 8K5 907 401 G HW: 4G0 907 401
Component: 3.0TDI EDC17 X41 0002
Revision: 53X41---
Coding: 12250012057703020000
Shop #: WSC 06208 000 00000
ASAM Dataset: EV_ECM30TDI0118K5907401G 001004
ROD: EV_ECM30TDI0118K5907401.rod
VCID: 34677DDC9F5666EA09-8060

1 Fault Found:
5170 - Manifold Pressure / Boost Sensor (G31)
P0237 00 [036] - Signal too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 102447 km
Date: 2022.05.08
Time: 11:31:25

Engine speed: 2808.50 /min
Normed load value: 99.6 %
Vehicle speed: 62 km/h
Coolant temperature: 53 °C
Intake air temperature: 23 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.560 V
Unlearning counter according OBD: 40
Mean injection quantity: 62.62 mg/stroke
Control Module temperature: 27.8 °C
EGR_governor_deviation: 38.3 mg/stroke
Inj Ctl q Curr: 62.58 mg/stroke
Mass_air_flow_sensor_drift: 0.0760
Air_Flow_Rate_from_Mass_Air_Flow_Sensor_kg_h: 738.8 kg/h
Actual charge pressure: 200 hPa

Readiness: 0 0 0 0 1

Does a MAP sensor require re-coding? I was under the impression that it was Plug&Play and you didn't need to 'teach' it.

If it's anything to go by, the car currently boosts a few hundred RPM higher with the new MAP sensor, before going into Limp Mode, than it did before, with the old MAP sensor.
This could be down to atmospheric conditions I suppose, or how i brought the boost up, but maybe it's useful, maybe it's not.

The replacement sensor is identical Bosch number and genuine Audi/VAG part, with the Audi Part Number on it, so not a chinese 50p ebay special.

 

[NHN]

Did you check the wiring?

 

[Scott325SE]

Hi NHN,
I don't have a Haynes/Bentley manual on this car, and no multimeter on-hand, so not on this occassion. I VISUALLY checked for breaks and poor appearing connections and the contacts were clean on the loom side.

I suppose my fundamental question began with whether there are common issues that the forum sees with these fault codes. And wheher the MAP sensor required re-coding.