What should I do?
I'm driving on the highway at 100-110km for an hour, glow plug light comes on, tried to accelerate but vehicle would not speed up, I could hold speed at 90km range but just barely, this lasted about 30 minutes. Made a stop, shut down for 30 minutes and all ok after that, happened 30 days ago.
Ran a scan yesterday and got PO401 & 403.
Vehicle still under dieselgate warranty for another 10,000 km. Problem has not happened since.

I can post full scan but for now here are fault codes;
4 Faults Found:
4807 - EGR System
P0401 00 [00100000] - Insufficient Flow
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 182834 km
Date: 2024.05.23
Time: 13:16:21
Engine RPM: 699.50 /min
Normed load value: 34.9 %
Vehicle speed: 0 km/h
Coolant temperature: 92 °C
Intake air temperature: 29 °C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.280 V
Unlearning counter according OBD: 25
Mean injection quantity: 10.42 mg/stroke
Control Module temperature: 61.3 °C
EGR_governor_deviation: -157.1 mg/stroke
Inj Ctl q Curr: 10.42 mg/stroke
Standardized air flow ratio: 1.1053
Air mass at air mass meter 1: 50.3 kg/h
Actual charge pressure: 1042 hPa

9120 - EGR Sensor 1
P046C 00 [01100000] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 182825 km
Date: 2024.05.23
Time: 13:10:38
Engine RPM: 1326.00 /min
Normed load value: 99.6 %
Vehicle speed: 88 km/h
Coolant temperature: 89 °C
Intake air temperature: 28 °C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.300 V
Unlearning counter according OBD: 25
Air mass: actual value (mg/stroke): 346.4 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
EGR Solen.val.: actual value: 94.73 %
EGR valve: offset closed: -3.38 %
High press EGR actuator: actual unconditioned volt val: 1094.8 mV
EGR valve: offset open: 3.38 %
31982 - EGR Valve (N18)
P0403 00 [00100000] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 183344 km
Date: 2024.05.30
Time: 10:57:22
Engine RPM: 1334.50 /min
Normed load value: 23.9 %
Vehicle speed: 88 km/h
Coolant temperature: 89 °C
Intake air temperature: 21 °C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.160 V
Unlearning counter according OBD: 32
Air mass: actual value (mg/stroke): 240.6 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
EGR Solen.val.: actual value: 94.12 %
EGR valve: offset closed: -3.63 %
High press EGR actuator: actual unconditioned volt val: 1124.0 mV
EGR valve: offset open: 3.63 %
31983 - EGR Valve (N18)
P0403 00 [00100000] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 183344 km
Date: 2024.05.30
Time: 10:57:21
Engine RPM: 1337.00 /min
Normed load value: 16.5 %
Vehicle speed: 88 km/h
Coolant temperature: 89 °C
Intake air temperature: 21 °C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.180 V
Unlearning counter according OBD: 32
Air mass: actual value (mg/stroke): 260.9 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 78.33 %
EGR Solen.val.: actual value: 71.45 %
EGR valve: offset closed: -3.63 %
High press EGR actuator: actual unconditioned volt val: 1896.2 mV
EGR valve: offset open: 3.63 %

 

What should you do?

If the codes have been stored, take the car to the dealer, ask for a loaner and have them contact you when it's fixed.

That's what warranties are for.

 

The CEL went off after the vehicle was shut off and has not come back on. Vehicle is not in limp mode.
Dealer will not do anything unless problem comes back.
Does anyone know what may have caused these codes ?

 

My guess is EGR Sensor 1 is going bad and throwing sporadic error code.

 

Thanks Dennis,
I will discuss with the dealer.