P00AF Actuator Module for Turbocharger

[DogParty]

Any input is very much appreciated!

Car's lightly modified, IS38, bolt ons, etc... Today under normal driving conditions, I got CEL and EPC. Codes are for each cylinder misfiring, multiple/random cylinders misfiring, and cylinder disabling. These codes have been in there for a while but 2 of the misfires and cylinder disabling refreshed for today (see below). These codes have been in there for a while because the car will trigger misfires and limp mode when breaking traction sometimes. A quick restart of the car always fixes it until I induce it with breaking traction again.

The new code I got is P00AF Actuator Module for Turbocharger. I'm assuming this is what caused all the misfiring and disabling again. It's funny how this code is dated from a few days ago and I've been driving the car hard since then just fine, and only today the problems arose. That day, car popped EPC at idle, no misfiring, disabling, etc... Restarted, and everything was fine.

Am I just replacing the wastegate actuator? Turbo is warrantied with FCP but I'd hate to have to replace it.
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Address 01: Engine (J623-CXBB)

7 Faults Found:
15074 - Cylinder Disabling
P130A 00 [00100000] - -
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 2
Mileage: 129217 km
Date: 2024.07.11
Time: 17:57:24

Engine RPM: 2102.75 /min
Normed load value: 15.3 %
Vehicle speed: 30 km/h
Coolant temperature: 90 C
Intake air temperature: 44 C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.750 V
Unlearning counter according OBD: 40
Engine: operating status: PL
N_TOOTH: 2044 /min
T_AST_SAE: 21 s
Engine oil temperature: 95.0 C
STATE_LS_SAE[1]: OL_ERR
FUP_H_SAE: 10430.0 kPa
FUP_EFP_MES: 11000.8 hPa

15125 - Cylinder 1
P0301 00 [11101101] - Misfire Detected
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 129217 km
Date: 2024.07.11
Time: 17:56:36

Engine RPM: 1195.00 /min
Normed load value: 10.2 %
Vehicle speed: 3 km/h
Coolant temperature: 97 C
Intake air temperature: 42 C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.906 V
Unlearning counter according OBD: 40
Engine: operating status: PL
N_TOOTH: 1180 /min
T_AST_SAE: 9 s
Engine oil temperature: 91.0 C
STATE_LS_SAE[1]: CL
FUP_H_SAE: 10360.0 kPa
FUP_EFP_MES: 11000.8 hPa

15131 - Cylinder 3
P0303 00 [01100000] - Misfire Detected
Intermittent - Not Confirmed - Tested Since Memory Clear

15134 - Cylinder 4
P0304 00 [01100000] - Misfire Detected
Intermittent - Not Confirmed - Tested Since Memory Clear

15128 - Cylinder 2
P0302 00 [11101101] - Misfire Detected
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 129217 km
Date: 2024.07.11
Time: 17:56:36

Engine RPM: 1195.00 /min
Normed load value: 10.2 %
Vehicle speed: 3 km/h
Coolant temperature: 97 C
Intake air temperature: 42 C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.906 V
Unlearning counter according OBD: 40
Engine: operating status: PL
N_TOOTH: 1180 /min
T_AST_SAE: 9 s
Engine oil temperature: 91.0 C
STATE_LS_SAE[1]: CL
FUP_H_SAE: 10360.0 kPa
FUP_EFP_MES: 11000.8 hPa

15137 - Random/Multiple Cylinder Misfire Detected
P0300 00 [11101101] - -
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 129217 km
Date: 2024.07.11
Time: 17:56:36

Engine RPM: 1195.00 /min
Normed load value: 10.2 %
Vehicle speed: 3 km/h
Coolant temperature: 97 C
Intake air temperature: 42 C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.906 V
Unlearning counter according OBD: 40
Engine: operating status: PL
N_TOOTH: 1180 /min
T_AST_SAE: 9 s
Engine oil temperature: 91.0 C
STATE_LS_SAE[1]: CL
FUP_H_SAE: 10360.0 kPa
FUP_EFP_MES: 11000.8 hPa

15202 - Actuator Module for Turbocharger 1
P00AF 00 [01100000] - Stuck
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 129003 km
Date: 2024.07.06
Time: 19:21:26

Engine RPM: 2513.50 /min
Normed load value: 26.7 %
Vehicle speed: 80 km/h
Coolant temperature: 83 C
Intake air temperature: 41 C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.496 V
Unlearning counter according OBD: 29
Status of charge air pressure control valve basic setting-LV_BPA_AD_REQ[0]: 00000000
Charge air pressure control valve uncond voltage sensor: 3.5742 V
Charge air pressure control valve position: target value: 80.20 %
Charge air pressure control valve position: actual value: 1.30 %
Charge air pressure control valve activation pulse duty factor: 86.66 %
Charge air pressure control valve voltage: position closed: 3.6667 V
STATE_BPA[0]: OPM

Readiness: 0000 0000

 

[Diggs24]

Stuck could be due to bad turbo. Replace it since it’s free.

 

[DogParty]

So this P00 AF (appropriately named now that I look at it again) hasn't popped again. Must have randomly popped from the other issue going on (hopefully). The problem is definitely occurring less frequently now...

It used to be going into a misfire, cylinder disable, limp mode cycle in traffic driving slowly, low RPM, idling at stoplights, or hot restarts. Now, it seems to only do it on the occasional hot restart. My idle is also much lumpier than it was before this all started.

A whole liter of clean oil spilled in my spare tire well a couple weeks before I started having these problems. The vast majority seemed to have been absorbed by the spare tire liner (which was unfortunately thrown out). Could this have contaminated the fuel pump, fuel tank, evap system, whatever else there is back there?

Also, my stock muffler cracked entirely down the seam. Could this be from the oil leaking on it? Or running rich/lean from fuel pump problems? Or too much pressure (IS38 with baun 3.5" DP and midpipe going into the Golf 2.25" axleback)?

I have VCDS, I just barely know how to use it

Thanks for any insight.

 

[langer]

Just had same code (actuator) this past week, twice. EPC/limp etc. No misfires though. Going to try and lube up the actuator arm/pivot to see if I can free it up. 2018 R.