2008 Jetta 000802 - Engine Speed Sensor (G28) Fault

[Skezza]

What is the VIN and the fault code numbers?

I've scanned it again and it's now got a different fault code on the engine:
VIN: WVWZZZ1KZ7M178797 License Plate:
Mileage: 198430km-123298mi Repair Order:



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Chassis Type: 1K (1K0)
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 56 62 72 76

VIN: WVWZZZ1KZ7M178797 Mileage: 198430km-123298miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: Malfunction 0010
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: Malfunction 0010
16-Steering wheel -- Status: Malfunction 0010
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: Malfunction 1010
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BKC.clb
Part No SW: 03G 906 021 KH HW: 03G 906 021 AN
Component: R4 1,9L EDC G000SG 9245
Revision: --H06--- Serial number: VWZ7Z0G9070756
Coding: 0000071
Shop #: WSC 00066 000 00000
VCID: 6FECEB207E9D0D3CF1-803A

1 Fault Found:
000802 - Knock Sensor 1 (G61)
P0322 - 000 - Malfunction - Intermittent
Freeze Frame:
Fault Status: 00110000
Fault Priority: 0
Fault Frequency: 18
Reset counter: 255
Mileage: 198248 km
Time Indication: 0
Date: 2000.00.00
Time: 08:29:37

Freeze Frame:
RPM: 840 /min
Voltage: 2.15 V
(no units): 12.0
Temperature: 4759.2°C
Bin. Bits: 00101100
Load: 261.2 %

Readiness: 0 1 0 0 0

I've left all of the other fault codes out for now.

[Crasher]

VAG UK have 52 speed sensors in stock, part number 036 906 433 E and Euro Car Parts have 864 in stock so someone is feeding you Bovine Excrement. There is something strange going on though, a BXE engine does knot have a G61 knock sensor...

[Skezza]

VAG UK have 52 speed sensors in stock, part number 036 906 433 E and Euro Car Parts have 864 in stock so someone is feeding you Bovine Excrement. There is something strange going on though, a BXE engine does knot have a G61 knock sensor...

Understood.

How would you proceed? I can take it another garage, a VW specialist? I can run it into the ground as a "car to work" and no further only? Or I can bang it spares repair on Gumtree and move it on?

[Skezza]

Quick update, drove it again tonight. Issue occurred again, however I did notice something different tonight. When the issue first occurred, the car seemed to lose power. It was as if the turbo couldn't boost, for about 20-30 seconds. I've noticed that if I'm going above about 20-30mph, the car bump starts itself back into life after the fault. I continued to drive and after about 30 seconds, it was as if the car was fine, but had blackpool lights on the dashboard. I captured some further diagnostics.

What's with the voltages.... 2.5v? 7v?

Driving to destination (fault occurred)

-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BKC.clb
Part No SW: 03G 906 021 KH HW: 03G 906 021 AN
Component: R4 1,9L EDC G000SG 9245
Revision: --H06--- Serial number: VWZ7Z0G9070756
Coding: 0000071
Shop #: WSC 00066 000 00000
VCID: 6FECEB207E9D0D3CF1-803A


1 Fault Found:
000802 - Engine Speed Sensor (G28)
P0322 - 000 - No Signal - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 0
Fault Frequency: 19
Reset counter: 255
Mileage: 198248 km
Time Indication: 0
Date: 2000.00.00
Time: 08:29:37


Freeze Frame:
RPM: 840 /min
Voltage: 2.15 V
(no units): 12.0
Temperature: 4759.2°C
Bin. Bits: 00101100
Load: 261.2 %


Readiness: 0 1 0 0 0

I then cleared the faults for the trip home. The issue reoccurred.

-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BKC.clb
Part No SW: 03G 906 021 KH HW: 03G 906 021 AN
Component: R4 1,9L EDC G000SG 9245
Revision: --H06--- Serial number: VWZ7Z0G9070756
Coding: 0000071
Shop #: WSC 00066 000 00000
VCID: 6FECEB207E9D0D3CF1-803A


2 Faults Found:
000802 - Knock Sensor 1 (G61)
P0322 - 000 - Malfunction - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 0
Fault Frequency: 20
Reset counter: 255
Mileage: 198248 km
Time Indication: 0
Date: 2000.00.00
Time: 08:29:37


Freeze Frame:
RPM: 840 /min
Voltage: 2.15 V
(no units): 12.0
Temperature: 4759.2°C
Bin. Bits: 00101100
Load: 261.2 %


005520 - Altitude Adaptation
P1590 - 000 - Signal Out of Tolerance - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 198471 km
Time Indication: 0
Date: 2000.00.00
Time: 21:30:45


Freeze Frame:
RPM: 0 /min
Voltage: 7.01 V
Mass Air / Rev.: 318.8 mg/str
Mass Air / Rev.: 10.0 mg/str
Bin. Bits: 00011010


Readiness: 1 1 0 0 0

However, there are other fault codes logged and some of them look bizarre. Here are a few:

01312 - Transmission Control Module
008 - Implausible Signal - Intermittent

The car is a manual.


02384 - Telephone Mount (R126)
009 - Open or Short to Ground

Doesn't have one.

Address 16: Steering wheel Labels: 1K0-953-549-MY8.lbl
Part No SW: 1K0 953 549 AP HW: 1K0 953 549 AP
Component: Lenksäulenmodul 636 0070
Coding: 0000041
Shop #: WSC 00066 000 00000
VCID: 000EB89C5303024418-8054


1 Fault Found:
01395 - Signal Conductor for Central Locking; Doors Open
014 - Defective - Intermittent

^ ?! Door definitely wasn't open and why is that under steering wheel...

01305 - Control Module for Roof Electronics (J528)
004 - No Signal/Communication - Intermittent

Definitely doesn't have any roof electronics.

03072 - Parallel Parking Assistance Control Module (J791)
004 - No Signal/Communication

On a 2008 Jetta?

03200 - Switch for Electric Parking Brake (E538)
012 - Electrical Fault in Circuit - MIL ON

It has a normal handbrake.


I tried to do some measurements:
21:42:54
924 /min Engine Speed (G28)
903 /min Engine Speed (G28)
0.0 Accel. Pedal Pos. Sensor 1 (G79)
945 /min Engine Speed (G28)
51088.0 Exhaust Gas Recirculat. (actual)
62.05 ms Exhaust Gas Recirc. Duty Cycle
924 /min Engine Speed (G28)
924 /min Engine Speed (G28)
0.0 Accel. Pedal Pos. Sensor 1 (G79)
0.5 °BTDC Intake Air Temperature (G72)
4.3 °ATDC Coolant Temperature (G62)

Seems the engine speed sensor is working OK. This was post-fault conditions.

I'm now wondering if I've got a defective ECU... That's my only explanation as it stands.

[Crasher]

Could be the ECU but I am more inclined to think a wiring problem. You need a VAG specialist who knows what they are doing or cares which I get the feeling the last one didn't

[Skezza]

Thanks. I've reached out to a VW specialist. Let's see what they say.

Do you know what kind of wiring faults are common with this car? I'm not all that handy with the mechanical side of stuff but I'm pretty good when it comes to car wiring, if I know where I'm looking. If there's somewhere to start, I can take a look.

One last thing to note, under View Readiness, Exhaust Gas Recirculation reads:

Failed or Incomplete.

The rest is fine.

[Crasher]

There is wiring around the turbo at the back of the head which can get damaged by heat but that tends to be cars with DPF, BMM 140PS and BMN 170PS engines. The G28 can get upset by all sorts, the other week we had a Q5 come in which had been to three other garages and had three G28's, the last one being Audi Nottingham. I knew straight where to look, put it in the air went to the back of the engine, unplugged the EGR valve and coolant poured out the plug. The EA189 EGR cooler leaks coolant into the motor and plug which spikes the G28 signal as it, and others, uses the same 5v power supply. If it is left for a long time, say it hasn't upset the G28, the coolant gets forced all the way back to the ECU up the tiny gaps in the cores of the wiring so you unplug the ECU and the connector is full of coolant as is the ECU and FUBAR!

[Skezza]

There is wiring around the turbo at the back of the head which can get damaged by heat but that tends to be cars with DPF, BMM 140PS and BMN 170PS engines. The G28 can get upset by all sorts, the other week we had a Q5 come in which had been to three other garages and had three G28's, the last one being Audi Nottingham. I knew straight where to look, put it in the air went to the back of the engine, unplugged the EGR valve and coolant poured out the plug. The EA189 EGR cooler leaks coolant into the motor and plug which spikes the G28 signal as it, and others, uses the same 5v power supply. If it is left for a long time, say it hasn't upset the G28, the coolant gets forced all the way back to the ECU up the tiny gaps in the cores of the wiring so you unplug the ECU and the connector is full of coolant as is the ECU and FUBAR!

My car definitely does not have a DPF. Would the EGR cooler issue you've just mentioned likely result in View Readiness, Exhaust Gas Recirculation saying Failed or Incomplete?

My current thoughts are that I'm going to see what I can do myself before taking it to the VW specialist who have quoted me £105 per hour to investigate. Ultimately, it seems that I can get where I need to go most days... it's just a bit rough and £105 an hour could get expensive rather quickly. These things are a rabbit hole.

I'll take a look at the wiring around the back of the turbo with what limited access I have sans ripping everything off... The other thing I'm wondering is, I can buy a BXE 1.9TDI ECU off eBay to see if there's an ECU issue. It would need me to clone the EEPROM from my current ECU (luckily something I've done once or twice before) but might be a way of ruling out an ECU fault?

[Crasher]

I have only seen it on engines with electrically operated EGR valves and the G28 is direct to ECU on the BXE. A new/used ECU is not plug and play, it has to be coded to the car (easy with VCDS) but matched to the immobilser in the instruments which isn't easy without ODIS or specialist aftermarket gear.

[Skezza]

I have only seen it on engines with electrically operated EGR valves and the G28 is direct to ECU on the BXE. A new/used ECU is not plug and play, it has to be coded to the car (easy with VCDS) but matched to the immobilser in the instruments which isn't easy without ODIS or specialist aftermarket gear.

Luckily, this is an area that I have some experience in. I don't usually pair the immo, opting to either clone / swap the EEPROM from the existing ECU or simply doing an IMMO OFF on the donor instead. Certainly on EDC15 and ME7.5 I've previously been able to extract the SKC as well which allows a proper pairing job. I know it all sounds very janky, but would help me avoid the whole ODIS / Abrites route. If I take it the specialists and it's the ECU, it's going to come back via the Abrites / ODIS route regardless and I know from experience that turns into £££.

Is there any risk if I plug a non-paired ECU and then plug the original ECU back in? I'm sure I've heard some VAG cars it can send the Instruments into a sad brick-like place (I'm thinking Audi with an RB8 cluster) and can leave the car in a non-start state.