Golf Mk6 2.0 Diesel - Temporary EGR Fault?

[damian33]

Hi,

Well my 2010 Golf Mk6 (2.0 diesel CFFB engine) never fails to disappoint.

In the past had a faulty EGR valve replaced and the air conditioning compressor. Latest thing to fail is the interior central front light switch/unit and there is a problem with the DAB aerial somewhere. I've also avoided the diesel software update so far.

Anyway, was driving to see family on Boxing Day, momentarily lost a little power and the engine warning lights came on. Restarted a few times but fault repeated, so limped back home. Had a local chap run a quick diagnostic and some faults with the EGR were listed. Interestingly the next day on the way to get the fault codes read, the warning lights had disappeared and the performance seems back to normal.

I just wondered whether anyone has any views on the faults and whether there is anything I perhaps need to do. I need to get the car serviced in a couple of weeks at my local independent VW garage, so can ask the chaps (unfortunately they are on their holidays at the moment so can't ask them for now).

Many thanks in advance,

Damian

=====================

4807 - EGR System
P0401 00 [096] - Insufficient Flow
Intermittent - Not Confirmed - Tested Since Memory Clear

4891 - EGR Valve (N18)
P0403 00 [096] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 221102 km
Date: 2017.12.26
Time: 14:43:10

Engine speed: 987.00 /min
Normed load value: 0.0 %
Vehicle speed: 17 km/h
Coolant temperature: 61 °C
Intake air temperature: 16 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 14.340 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 376.7 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
EGR Solen.val.: actual value: 96.11 %
EGR valve: offset closed: 3.21 %
Actuator for high pressure EGR: status-Bit 0: 0
Actuator for high pressure EGR: status-Bit 16: 19
Actuator for high pressure EGR: status-Bit 24: 55
Actuator for high pressure EGR: status-Bit 8: 7
High press EGR actuator: actual unconditioned volt val: 1020.2 mV

4892 - EGR Valve (N18)
P0403 00 [104] - Malfunction
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 6
Mileage: 221091 km
Date: 2017.12.26
Time: 13:19:31

Engine speed: 1304.00 /min
Normed load value: 59.6 %
Vehicle speed: 54 km/h
Coolant temperature: 69 °C
Intake air temperature: 13 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 14.360 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 277.3 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
EGR Solen.val.: actual value: 32.31 %
EGR valve: offset closed: 4.16 %
Actuator for high pressure EGR: status-Bit 0: 0
Actuator for high pressure EGR: status-Bit 16: 0
Actuator for high pressure EGR: status-Bit 24: 55
Actuator for high pressure EGR: status-Bit 8: 7
High press EGR actuator: actual unconditioned volt val: 2906.0 mV

[Rob69]

The Golf's just reminding you it's still there and wants a bit love and attention. You don't say how long ago fitted and if the replacement EGR was OEM ( I believe these OEM coolers / valves come with 2 year warranty)
The coolant looks on the cool side as well as the EGR fault, unless it had only been running a few minutes.

[damian33]

Hi,

Thanks for the reply.

EGR was replaced back in 2012 by the dealer, so out of warranty.

Had done an hour up the M6 before it faulted, just come off at Stoke to avoid the (usual) queues, so not just started the engine.

[Rob69]

Ok, if the engine is straight off a decent run I'd ask them to look at your thermostat(s) as well as the EGR during the service then, as it's running cool.

[Keithuk]

Hi,

Well my 2010 Golf Mk6 (2.0 diesel CFFB engine) never fails to disappoint.

In the past had a faulty EGR valve replaced and the air conditioning compressor. Latest thing to fail is the interior central front light switch/unit and there is a problem with the DAB aerial somewhere. I've also avoided the diesel software update so far.

Anyway, was driving to see family on Boxing Day, momentarily lost a little power and the engine warning lights came on. Restarted a few times but fault repeated, so limped back home. Had a local chap run a quick diagnostic and some faults with the EGR were listed. Interestingly the next day on the way to get the fault codes read, the warning lights had disappeared and the performance seems back to normal.

I just wondered whether anyone has any views on the faults and whether there is anything I perhaps need to do. I need to get the car serviced in a couple of weeks at my local independent VW garage, so can ask the chaps (unfortunately they are on their holidays at the moment so can't ask them for now).

Many thanks in advance,

Damian

=====================

4807 - EGR System
P0401 00 [096] - Insufficient Flow
Intermittent - Not Confirmed - Tested Since Memory Clear

4891 - EGR Valve (N18)
P0403 00 [096] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 221102 km
Date: 2017.12.26
Time: 14:43:10

Engine speed: 987.00 /min
Normed load value: 0.0 %
Vehicle speed: 17 km/h
Coolant temperature: 61 °C
Intake air temperature: 16 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 14.340 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 376.7 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
EGR Solen.val.: actual value: 96.11 %
EGR valve: offset closed: 3.21 %
Actuator for high pressure EGR: status-Bit 0: 0
Actuator for high pressure EGR: status-Bit 16: 19
Actuator for high pressure EGR: status-Bit 24: 55
Actuator for high pressure EGR: status-Bit 8: 7
High press EGR actuator: actual unconditioned volt val: 1020.2 mV

4892 - EGR Valve (N18)
P0403 00 [104] - Malfunction
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 6
Mileage: 221091 km
Date: 2017.12.26
Time: 13:19:31

Engine speed: 1304.00 /min
Normed load value: 59.6 %
Vehicle speed: 54 km/h
Coolant temperature: 69 °C
Intake air temperature: 13 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 14.360 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 277.3 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
EGR Solen.val.: actual value: 32.31 %
EGR valve: offset closed: 4.16 %
Actuator for high pressure EGR: status-Bit 0: 0
Actuator for high pressure EGR: status-Bit 16: 0
Actuator for high pressure EGR: status-Bit 24: 55
Actuator for high pressure EGR: status-Bit 8: 7
High press EGR actuator: actual unconditioned volt val: 2906.0 mV

VAG Error Code: 16785/001025/4807/7337
EOBD II Error Code: P0401

Fault Location:
Exhaust Gas Recirculation (EGR) System - Insufficient Flow Detected

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Reduced Exhaust Gas Recirculation (EGR).
Reduced Power Output/Engine running rough.
Increased Emissions.

Wiring/Connector(s).
Hose leak/blockage.
Exhaust Gas Recirculation (EGR) Flow restricted/clogged.
Exhaust Gas Recirculation (EGR) Valve stuck closed/leaking/faulty.
Exhaust Gas Recirculation (EGR) System faulty.

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Check/Clean Exhaust Gas Recirculation (EGR) System.
Read Measuring Value Blocks (MVB).
Check/Replace Exhaust Gas Recirculation (EGR) Valve.
Control deviation < limit from map f (engine speed, desired airflow).

Special Notes:
When this fault is stored in a 2009-2012 North American Region (NAR) market 2.0L CR TDI
(CBEA, CJAA, CKRA) VW Jetta/Golf (1K/AJ) or the NMS Passat (A3) chassis:
Please see: Technical Service Bulletin (TSB) 26-13-03 | Technical Product Information (TPI) #2031583/3 (formerly know as 26-12-08 | Technical Product Information (TPI) #2031583). When the Exhaust Valve Control Module (J883) is faulty, the engine controller may have any of the following Diagnostic Trouble Codes (DTCs):P046F, P0477, P048A, P048B, P048C, P0401. Some TDI-CR engines have a filter for the Exhaust Gas Recirculation (EGR) that can become restricted and cause a "Insufficient Flow" code.

When this fault
is stored in a 2009-2014 North American Region (NAR) market 2.0L CR TDI (CBEA or CJAA ) VW Jetta/Golf (1K/AJ).
Please See Technical Product Information (TPI) 01 14 11 | #2034898 May also have fault code stored in Engine Control Module (ECM).
009315/P2463/009315 - Diesel Particulate Filter (DPF) - Excessive Soot Accumulation.
Restrictions in the Exhaust Gas Recirculation (EGR) Filter may occur after a regeneration, if the soot loads where high before the regeneration.

Tech Notes:
Exhaust Gas Recirculation (EGR) flow malfunction could be caused by a clogged Exhaust Gas Recirculation (EGR) valve or Exhaust Gas Recirculation (EGR) tube. Before
replacing any parts try cleaning the Exhaust Gas Recirculation (EGR) valve, tube and passages.

When is the code detected?:
Low Exhaust Gas Recirculation (EGR) flow control is detected.

VAG Error Code: 16787/001027/4891/4892/7461/7462
EOBD II Error Code: P0403

Fault Location:
Exhaust Gas Recirculation (EGR) Recirculation Valve (N18) - Malfunction

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Rough Idle Speed and/or Engine stalling.
Loss of Power.

Fuse(s).
Wiring/Connector(s).
Exhaust Gas Recirculation (EGR) Recirculation Valve (N18) stuck/faulty.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Check/Replace Exhaust Gas Recirculation (EGR) Recirculation Valve (N18).

When is the code detected?:
An improper voltage signal is sent to Engine Control Module (ECM) through the valve.

VAG Error Code: 16787/001027/4891/4892/7461/7462
EOBD II Error Code: P0403

Fault Location:
Exhaust Gas Recirculation (EGR) Recirculation Valve (N18) - Malfunction

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Rough Idle Speed and/or Engine stalling.
Loss of Power.

Fuse(s).
Wiring/Connector(s).
Exhaust Gas Recirculation (EGR) Recirculation Valve (N18) stuck/faulty.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Check/Replace Exhaust Gas Recirculation (EGR) Recirculation Valve (N18).

When is the code detected?:
An improper voltage signal is sent to Engine Control Module (ECM) through the valve.


As taken from my new EOBD II Error Codes