Mystery electrical problems

[notquiteacupra]

Well I have just bought a 2004 seat Leon SX 1.6 16v (BCB) last week the engine light has came on, i have plugged it into diagnostics and have quite a few fault codes, had it into my friends garage and we're no nearer to the cause of the problem.

I'm having low/dim lights at low revs, and the power steering cut out on me once at low revs leaving the steering wheel unmovable restarting the car fixed this.

All the Earth's have been checked and a brand new fully charged battery has been installed, but we're still scratching our heads as to what the problem is, anyway the fault codes are as follows, if anyone could offer any advice i would really appreciate it.


3 Faults Found:
17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1: Electrical Malfunction
P1196 - 35-10 - - - Intermittent
17586 - Linear O2 Sensor: Pump Current: Open Circuit
P1178 - 35-10 - - - Intermittent
17589 - Linear O2 Sensor: Reference Voltage: Open Circuit
P1181 - 35-10 - - - Intermittent
VAG-COM Version: Release 409.1-S

2 Faults Found:
01179 - Incorrect Key Programming
35-00 - -
00928 - Locking Module for Central Locking: Front Driver Side (F220)
27-10 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC
Controller: 1M0 820 043 E
Coding: 00041
Shop #: WSC 06402
Note: Excessive Comm Errors

-------------------------------------------------------------------------------
Address 15: Airbags
Controller: 1C0 909 605 A
Component: 39 AIRBAG VW51 0A 0008
Coding: 13113
Shop #: WSC 06401
1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments
Controller: 1M0 920 902 A
Component: KOMBI+WEGFAHRSP VDO V05
Coding: 04406
Shop #: WSC 00000
VSSZZZ1MZ4R095955 SEZ7Z0D2352771
4 Faults Found:
00779 - Outside Air Temp Sensor (G17)
30-10 - Open or Short to B+ - Intermittent
00779 - Outside Air Temp Sensor (G17)
29-10 - Short to Ground - Intermittent
00667 - Ambient Temperature Signal
30-10 - Open or Short to B+ - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 19: CAN Gateway
Controller: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 06402
1 Fault Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------

 

[akchappers]

Did you check the alternator output?
Ak

 

[notquiteacupra]

Yes checked alternator, all fine charging at 14.5v.

 

[mty12345]

Hi mate, welcome to the forum.

The 3 engine codes relate to the lambda sensor before the cat. Either the wiring has broken somewhere or the sensor itself needs replacing. They will be the 3 codes that are triggering the engine light.

The 2 locking faults... The first one about the key i've had on my own car and i think is caused by the second code, which is almost certainly your drivers door lock module that needs replacing. (common fault) Guide here for you. http://forums.vwvortex.com/showthre...indow-regulator-clips-and-or-door-lock-module
I'd just buy a replacement from module ebay, they work fine and are a fraction of the price of a genuine item. http://www.ebay.co.uk/itm/FRONT-RIG...l:Leon&hash=item2585c186ef:g:-7oAAOSwPYZU2jaA

The airbag code about "low power supply" is probably just because the battery has been disconected at some point.

Not sure about the codes for the outside air temp. Possibly the wiring, possibly the sensors or the earth points. As the fault is intermittant i'd delete the codes and see if they return before you worry about it. If you want to check it then it's by the passenger side fog light on the cupra's, i imagine it would be the same location on yours. Does the temp display on the rev counter work ok?

Hope that's some help for you.

 

[notquiteacupra]

Hi mate, welcome to the forum.

The 3 engine codes relate to the lambda sensor before the cat. Either the wiring has broken somewhere or the sensor itself needs replacing. They will be the 3 codes that are triggering the engine light.

The 2 locking faults... The first one about the key i've had on my own car and i think is caused by the second code, which is almost certainly your drivers door lock module that needs replacing. (common fault) Guide here for you.
I'd just buy a replacement from module ebay, they work fine and are a fraction of the price of a genuine item.

The airbag code about "low power supply" is probably just because the battery has been disconected at some point.

Not sure about the codes for the outside air temp. Possibly the wiring, possibly the sensors or the earth points. As the fault is intermittant i'd delete the codes and see if they return before you worry about it. If you want to check it then it's by the passenger side fog light on the cupra's, i imagine it would be the same location on yours. Does the temp display on the rev counter work ok?

Hope that's some help for you.

Hi and thanks for the welcome, I have already ordered a replacement out air temp sensor and I'm expecting it tommorow, hopefully that sorts that issue out.

Would you happen to have a link to a wiring diagram for the mk1 leon so I know what wires to check for the lambda?

you right about the intermittent faults they go away when cleared apart from the following one's.

17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1: Electrical Malfunction

-------------------------------------------------------------------------------
Address 08: Auto HVAC
Controller: 1M0 820 043 E
Coding: 00041
Shop #: WSC 06402
Note: Excessive Comm Errors

-------------------------------------------------------------------------------
Address 15: Airbags
Controller: 1C0 909 605 A
Component: 39 AIRBAG VW51 0A 0008
Coding: 13113
Shop #: WSC 06401
1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
4 Faults Found:
00779 - Outside Air Temp Sensor (G17)
30-10 - Open or Short to B+ - Intermittent
00779 - Outside Air Temp Sensor (G17)
29-10 - Short to Ground - Intermittent
00667 - Ambient Temperature Signal
30-10 - Open or Short to B+ - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent

What I did find strange is is vag-com seemed to crash when scanning auto HVAC and completely failed, coming up as an excessive comms error.

 

[mty12345]

The best i've got i'm afraid mate.......IT'S FOR THE 1.8t!! (but hopefully the lambda wiring is the same on the whole range)

[/URL][/IMG]

[/URL][/IMG]

[/URL][/IMG]

[/URL][/IMG]

 

[notquiteacupra]

Lambda screwed open circuit, I cant post links yet being new, but I was wondering, would product code: 710770407 be a straight replace?

Just search the number on eurocarparts and you will go straight to to one I mean.

 

[mty12345]

Not sure mate tbh, not got much experience of your engine. Eurocarparts will be able to confirm from your reg number i expect.