Volvo S80 A performance sedan that offers top notch luxury, outstanding handling and so much more.

CEL Spark Plug reading

  #1  
Old 07-16-2010, 10:53 PM
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 12
Default CEL Spark Plug reading

Hello, I have a 99' S80 T6, the car had a check engine light that came on and I pulled the code and it was P0236, P0300, P1181. First thing I did was change the spark plugs to narrow the trouble shoot down. When I removed the spark plugs (starting on passenger side) the left 3 cylinders had a black coated surface. Then I removed the next 3 and they had a white powdery coat( I think that means its working fine since its burning). My concern was the first 3 plugs that were removed. Seems like they are either not firing or oil leaking into the cylinders. anyone with an input on this?
 
  #2  
Old 07-17-2010, 08:53 AM
Senior Member
Join Date: Dec 2008
Location:
Posts: 452
Default

what do the codes mean ?

the plugs with the oil on them are fouled, i think that means the piston rinds on those cylinders are shot, the white coating on the other three is carbon build up, its fine more or less thats a byproduct of combustion and happens with age

if your piston rings are shot thats really bad, see a mechanic to make sure
 
  #3  
Old 07-17-2010, 10:27 AM
Senior Member
Join Date: Jul 2009
Posts: 275
Default

I thought I read somewhere that when this occurs, its because the O2 sensors are sending a too rich signal causing bank one to run rich. I didn't look up your codes, but i don't think all three rings went bad at the same time. I think its time for some new O2 sensors.
 
  #4  
Old 07-17-2010, 06:30 PM
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 12
Default

hmmm Looks like Ill be back at the shop on monday then. Probably do a compression test and check o2 sensors. thanks
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Volvo_Oz
Volvo 850
1
09-06-2013 11:35 AM
matt01
Volvo 850
2
07-23-2012 11:12 AM
striderb
Volvo V40
0
05-30-2012 11:37 PM
futbolfan15
Volvo S40
1
04-02-2010 09:56 PM


Thread Tools
Search this Thread
Quick Reply: CEL Spark Plug reading


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.