16684 - Random/Multiple Cylinder Misfire Detected

[RossyB]

Guys just turned the car on bout an hour ago and it was spluttering it tits off, got the vag com out and this code appeared i though that was the case, is this quite common? and what do people normally do about rectifying this problem?

cheers

 

[acidstrato]

very common, if you had search you have found plenty recent threads

might need new plugs if they are quite old otherwise coilpacks

usually theres 2 codes, that one and another telling you the specific cylinder?

 

[RossyB]

i did search mate just came up with the fault codes thread thats all. this is what came up:

VAG-COM Version: Release 409.1-S

Control Module Part Number: 6K0 906 032 AA
Component and/or Version: 1.8L 20VT EU3 0002
Software Coding: 10500
Work Shop Code: WSC 78896
2 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16688 - Shareware Version. To Decode all DTCs
P0304 - 35-00 - Please Register/Activate

 

[AndyHazza]

Very common like acidstrato said, more than likely a coilpack but if you havent changed plugs in a while then again it could be linked to that.

 

[AndyHazza]

So you need the full version of VAG-com to see exactly which cylinder is misfireing.

 

[RossyB]

do you have to buy it or can it be downloaded?

 

[acidstrato]

ahhhh i never realised shareware versions didnt say which cylinder

it wont be hard to find out though, u can either search for the other code on rosswiki or find the thread with all the codes in and find the other code on there, will tell u which cylinder is causing problems then

 

[acidstrato]

do you have to buy it or can it be downloaded?

you pay

 

[acidstrato]

its cylinder 4 id guess just by the fault code and some of my fancy logic best check though

16684 - Random/Multiple Cylinder Misfire Detected
16685 - cylinder 1
16686 - 2
16687 - 3
16688 - cylinder 4

 

[RossyB]

cheers mate very helpful, gonna go buy some new plugs now, what would you suggest?

 

[acidstrato]

i just use basic ngk ones about 3quid each from euro car parts

 

[RossyB]

changed the plugs, ticks over abit better but still misfiring, can you show me whereabouts the coilpack is lol ive not a clue!? it came up with these codes this time..

VAG-COM Version: Release 409.1-S

Control Module Part Number: 6K0 906 032 AA
Component and/or Version: 1.8L 20VT EU3 0002
Software Coding: 10500
Work Shop Code: WSC 78896
3 Faults Found:
17840 - Secondary Air Injection Solenoid Valve (N112): Open Circuit
P1432 - 35-10 - - - Intermittent
16684 - Shareware Version. To Decode all DTCs
P0300 - 35-00 - Please Register/Activate
16688 - Shareware Version. To Decode all DTCs
P0304 - 35-00 - Please Register/Activate

 

[acidstrato]

if u swapped the plugs mate then u removed the coilpacks, they are the black things thank you plug onto the spark plugs

u can get stock coilpacks from dealers or replacements from euro car parts which is where i go as they are cheaper. u need to swap number 4 i think which is the one underneath the charge pipe unfortunatly

 

[Craig!]

Coil pack is the think you removed to change the spark plugs, the plastic plug like thing thats sits on the top of your rocker cover and clips onto the plugs.

 

[RossyB]

yeh my dad changed the plugs lol. ok i know the bit your on about so looking at the vag com results i will need to replace 1 & 4, is that right?

 

[acidstrato]

no just 4,

the first code means random misfire detected, then the second gives u what cylinder. ignore the secondary injection one for now they arent related, but i think your dad has left one of the sensors unplugged on top of the engine (stuff u have to remove to change the plugs)

and the car should be cured instantly, how long until another pops though, only time will tell, but atleast u know the procedure

 

[RossyB]

cheers mate appreciate your help, seat gave me a price of £25 + vat for one.