I've got an engine light on and I keep blowing fuse 9 which is a 10 amp, on scanning it I'm getting mixed codes of steering angle sensor - low voltage, driver assist front sensor and parking/Driver assist, I also have lost start/stop and cruise control, no evidence of shorts anywhere, car drives perfect but consistently blows the same fuse, anyone any ideas ?

For information its a 2015 Petrol Octavia VRS 

3 minutes ago, Y400VRS said:

I've got an engine light on and I keep blowing fuse 9 which is a 10 amp, on scanning it I'm getting mixed codes of steering angle sensor - low voltage, driver assist front sensor and parking/Driver assist, I also have lost start/stop and cruise control, no evidence of shorts anywhere, car drives perfect but consistently blows the same fuse, anyone any ideas ?

For information its a Mk 3 petrol octavia VRS

Have you got a registration as different fuses are powering different things depending on specific engine.

 

Edit: Ive taken the reg to be your user name - Octaiva 2015 VRS 2.0 TSI CHHB engine.

 

Please post an exact list of fault codes, and also which of the 3 fuse boxes fuse 9 we are talking about

 

 

 

 

 

Edit again: Interior fuse box SC9 is 15A and does all-wheel-drive control unit which yours isnt, so im going to assume engine bay fuse SB9 10A which is as follows;

 

SB9 - 10A

-

engine electronics (for engine code CJSA, CJSB, CHHA, CHHB)

 

 

Fuse SB9 feeds the following components on a rt/gn wire (changes colour in engine harness to either rt, rt/ws or ws/gn) - N80 charcoal solenoid, N205 Intake camshaft control valve, N318 Exhaust camshaft control valve, V51 Coolant circulation pump

I would eliminate the easy ones, disconnect the charcoal and 2 camshaft solenoids and leaves the water pump, chances are you have water leaking out the pump, up the wiring and causing a short circuit.

Edited 12 February, 20242 yr by ApertureS

11 hours ago, ApertureS said:

Have you got a registration as different fuses are powering different things depending on specific engine.

 

Edit: Ive taken the reg to be your user name - Octaiva 2015 VRS 2.0 TSI CHHB engine.

 

Please post an exact list of fault codes, and also which of the 3 fuse boxes fuse 9 we are talking about

 

 

 

 

 

Edit again: Interior fuse box SC9 is 15A and does all-wheel-drive control unit which yours isnt, so im going to assume engine bay fuse SB9 10A which is as follows;

 

SB9 - 10A

-

engine electronics (for engine code CJSA, CJSB, CHHA, CHHB)

 

 

Fuse SB9 feeds the following components on a rt/gn wire (changes colour in engine harness to either rt, rt/ws or ws/gn) - N80 charcoal solenoid, N205 Intake camshaft control valve, N318 Exhaust camshaft control valve, V51 Coolant circulation pump

I would eliminate the easy ones, disconnect the charcoal and 2 camshaft solenoids and leaves the water pump, chances are you have water leaking out the pump, up the wiring and causing a short circuit.

Correct it was the engine bay fuse box, this sounds most likely, would/could this explain the loss of cruise control and stop start also ?

 

9 hours ago, Y400VRS said:

Correct it was the engine bay fuse box, this sounds most likely, would/could this explain the loss of cruise control and stop start also ?

 

Yes as any kind of engine fault will stop the cruise and stop start working generally. 

Superb, ive got it booked in to VAGTEC on 29th so hopefully this is all useful information for them, trying to keep the bill as low as possible 🤞 weirdly today I tried a new fuse as I'd unplugged a few more plugs after inspection and the fuse blew immediately without there being any power on (ignition), I found that odd as I'd assume there would need to be power demanded for it to blow ?

 

8 hours ago, Y400VRS said:

Superb, ive got it booked in to VAGTEC on 29th so hopefully this is all useful information for them, trying to keep the bill as low as possible 🤞 weirdly today I tried a new fuse as I'd unplugged a few more plugs after inspection and the fuse blew immediately without there being any power on (ignition), I found that odd as I'd assume there would need to be power demanded for it to blow ?

 

A lot of car modules receive constant 12v supplies nowadays and are always on. They are woken up by canbus and other methods when required like the ignition or engine being turned on.

Good to know, thanks for your help, much appreciated 👍