Coilpacks

[forbsie09]

I've just literally got myself my first ever Volvo its an early V70 2.4 - a 1999 model, anyway, I only got it on Wednesday, but yesterday morning the engine management light came on, I've had it diagnosed at my regular/local garage (for free) came up coilpack / plug, cylinder 2, + saying immobiliser- key fob locks and unlocks the car, and it starts, so surely the immobiliser must be fine ? they re-set it, said see how it goes, the car drives normally, no pulling issues or anything like that ! anyhow, all day yesterday it was fine, and this morning the engine management light is on again !
Now, I can replace said coilpack and plug myself no problem, but will the engine management light go out ? or does that have be re-set as well by a diagnostic machine ?

[pff]

Depends on what has set the light this time around, either one could be an old code.
Both are fairly common, the immobiliser is usually to do with the antenna ring around the key hole contacts need cleaning, plenty of information about it if you have a search.
Coil pack i think the normal procedure is to check which cylinder then swap the coil pack with a different cylinder to see you get a new code then you can say its the coil pack or something else (e.g. spark plug or wiring).
Most faults the light will turn itself off after you complete a certain number of drive cycles with the problem rectified. VIDA i think will tell you per code what the warning light set/clear parameters are.
Even a cheap fault code reader is invaluable bit of kit, a proper elm327 or a good quality clone can read off and reset pretty much anything with a little research.

[forbsie09]

Originally Posted by pff

Depends on what has set the light this time around, either one could be an old code.
Both are fairly common, the immobiliser is usually to do with the antenna ring around the key hole contacts need cleaning, plenty of information about it if you have a search.
Coil pack i think the normal procedure is to check which cylinder then swap the coil pack with a different cylinder to see you get a new code then you can say its the coil pack or something else (e.g. spark plug or wiring).
Most faults the light will turn itself off after you complete a certain number of drive cycles with the problem rectified. VIDA i think will tell you per code what the warning light set/clear parameters are.
Even a cheap fault code reader is invaluable bit of kit, a proper elm327 or a good quality clone can read off and reset pretty much anything with a little research.

I dont have a code reader, if it came up cylinder 2 coilpack , then surely that wont change ? I'm giving the interior a thorough steam clean and shampoo tomorow, so I'll be doing the key hole too.