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Hi guys,

 

New to this forum but owned a Lupo GTI for a while now. I’ve had an EML light on for a while now and I just can’t figure out what the cause is. The light first came on last year and since then the car has had an engine replacement with a reconditioned engine but still the fault code persists.

Ive replace the camshaft timing sensor and already tried disconnecting the breather heater (aparantly this can cause this fault) my fuse 30 was blow but I replaced it disconnected the breather heater and the light came back but fuse 30 is fine.

i could really do with some advice here as it’s driving me mad. 

Fault codes I currently have are

17748- camshaft position sensor/engine speed sensor; incorrect correlation

16394- camshaft timing control, bank 1; malfunction

17911- load signal from alternator terminal DF; implausible signal

16522- O2 sensor circuit high voltage (bank 1 sensor 2)

16514-  O2 sensor circuit malfunction (bank1 sensor 1)

17759- camshaft position sensor, bank 1 implausible signal on startup

 

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Firstly welcome to club lupo :)

more than one fault by the sounds of it...

first guess is cambelt jumped a tooth.

vacuum leak somewhere.

not sure about 17911 just yet. Odd.

plug in the o2 sensor. Or replace it.

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4 hours ago, mk2 said:

Firstly welcome to club lupo :)

more than one fault by the sounds of it...

first guess is cambelt jumped a tooth.

vacuum leak somewhere.

not sure about 17911 just yet. Odd.

plug in the o2 sensor. Or replace it.

Thanks dude. The O2 sensor faults are probably unrelated and I beleive I’ve sorted the alternator issue, some dodgy bodged wiring.The issue was present before the engine change and upon looking the timing doesn’t appear to be out.

im kind of stumped at this point and worried I’m going to have to go to some sort of specialist and spend a fortune to fix it 🤦‍♂️

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3 hours ago, Sausage said:

Deffo check cam timing, also oil pressure for the VVT bits, the rest is probably wiring and sensors.

Doesn’t appear to be out and I haven’t checked oil pressure. Wiring from the sensor plugs to the plugs mounted at the side of the engine seem ok and I’ve replaced the camshaft sensor but can’t seem to find anywhere to buy the camshaft actuator 🤔

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What are you using for the timing reference marks? Is the VVT at zero/depressurised /off when you check the timing?

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1 hour ago, mk2 said:

What are you using for the timing reference marks? Is the VVT at zero/depressurised /off when you check the timing?

The new engine was already marked so my mechanic lined it up to how it was marked and I wouldn’t know how to check those things if I’m honest. I’m handy enough but this sort of thing is beyond me

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Welcome

Just checking - These fault codes, have they been cleared and keep coming back?

If you have already found bodged wiring there may well be more, trace the engine loom from the cam sensor to see if there has been any additional interference.

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2 hours ago, LR5V said:

Welcome

Just checking - These fault codes, have they been cleared and keep coming back?

If you have already found bodged wiring there may well be more, trace the engine loom from the cam sensor to see if there has been any additional interference.

Thanks,

 

Yes, I’ll clear them and they will stay off for about an hour, they usually come back upon startup.

i have traced wiring about with a glow pen but I’ve just borrowed a multimeter to try instead

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2 hours ago, Sausage said:

Check for blown fuse 30.

Fuse 30 was blown when I checked it a couple weeks ago, I replaced it and unplugged the breather heater. Fault code have been cleared and come back several times since but fuse 30 hasn’t blown.

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3 minutes ago, Brainwaves said:

i have traced wiring about with a glow pen but I’ve just borrowed a multimeter to try instead

Ideally you need to check continuity between sensor and ECU - have you got a wiring diagram to identify the pin at the ECU?

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40 minutes ago, LR5V said:

Ideally you need to check continuity between sensor and ECU - have you got a wiring diagram to identify the pin at the ECU?

I haven’t but I see you’ve attached one, thank you buddy.

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