09-16-2013, 11:25 AM
|
#1
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
CEL after maintenance
Bought a very clean, one-owner and well-maintained ’01 Boxster S with 38k miles. Ran great!
Changed the air filter after about 500 miles. Popped the first CEL . Code read aging O2 sensor bank 2. Cleared, ran fine. Would display CEL on occasion and, while I waited on the parts to arrive, I would just clear them out with my OBD II tool.
Changed the sensors on Sunday. Started, and immediately began running rough and blinking CEL came on. Read code, P0302. Bad coil possibly? After changing the O2 sensors?
Thinking of possible causes: all the way back to replacing the air filter. Could I have installed it incorrectly, maybe rolled the gasket and air is getting in? It looks fine, but I might buy another and try again. After I change that coil out, of course…
Might order a Durametric and dig a little deeper...
Another data point: the left side upstream O2 sensor tip was completely white in color. The right tip was dark reddish... don't know if that means anything but it stood out to me...
Any ideas?
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
09-16-2013, 12:39 PM
|
#2
|
|
Registered User
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,666
|
I had a CEL indicate the Catalytic converter was not up to spec.
Cleared it 4 months ago and it never came back.
I would check the sensors cabling for loose or dirty connections first before
starting to replace things.
__________________
"It broke because it wants to be Upgraded  "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
|
|
|
|
|
09-16-2013, 12:58 PM
|
#3
|
|
Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,497
|
When you changed your air filter, did you disconnector or clean your MAF sensor? Go back and double check the MAF connector. Might want to clean the sensor as well.
|
|
|
|
|
09-16-2013, 05:34 PM
|
#4
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
No I did not check the MAF. I will now though... Thanks!
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
|
09-16-2013, 06:58 PM
|
#5
|
|
Registered User
Join Date: Sep 2010
Location: Foster City CA
Posts: 1,099
|
I noticed in your original post that you had a blinking CEL. A blinking CEL indicates a serious problem which calls for shutting down the engine before substantial damage occurs.
Perhaps a few of the more technically savvy folks on the forum could suggest what to do next. If it were me, I would tow the car to the repair shop and let them diagnose the problem because don't like to take big risks.
A durametric cable is really valuable if you are going to maintain the car yourself over the next several years
|
|
|
|
|
09-17-2013, 04:17 AM
|
#6
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
Had to start the car to move it into my barn yesterday. Checked for code first, nothing. Started and ran fine.
I think I will start from the beginning...
Check air filter
Check MAF connection
Check all connections at coils and O2 sensors.
Thanks for all your replies!!
Jim
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
|
09-17-2013, 07:10 AM
|
#7
|
|
soucorp
Join Date: Apr 2013
Posts: 181
|
Quote:
Originally Posted by bglz42
Had to start the car to move it into my barn yesterday. Checked for code first, nothing. Started and ran fine.
I think I will start from the beginning...
Check air filter
Check MAF connection
Check all connections at coils and O2 sensors.
Thanks for all your replies!!
Jim
|
Your car is almost like mine, 2001 with 38k on it. I had to replace my MAF sensor, it went bad and it fixed my CEL for a lean engine fault. Since you changed your O2 sensor, try getting a new MAF and reset the ECU. She should run just fine after that.
The thing to remember here is that the CEL codes are not always 100% accurate, any good mechanic will tell you. It nearly points you towards the area that could cause the fault but it could be upstream or downstream so first change the least amount in parts with the biggest influence in engine performance = MAF sensor.
Best
Last edited by soucorp; 09-17-2013 at 07:49 AM.
|
|
|
|
|
09-17-2013, 07:39 AM
|
#8
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
Thanks Soucorp! I just ordered a Durametric. I think my OBD II reader was a little too generic...
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
|
09-23-2013, 12:45 PM
|
#9
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
Durametric should arrive via UPS tomorrow... but in the meantime...
I put some fresh fuel in and ran it all weekend. No problems at all, ran like a champ! That might have been the problem all along... I bought fuel on the way home from Boxstoberfest, (not at my go-to station), and the fuel might not have been good...
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
|
10-07-2013, 12:10 PM
|
#10
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
LOL! Spoke too soon...
P0302 code is back. I bought a coil, and will replace the number 2... will report back after.
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
|
10-07-2013, 07:39 PM
|
#11
|
|
Registered User
Join Date: May 2011
Location: Miami florida
Posts: 1,591
|
You need to post what a 302 error code means, or if you don't know, ask for what it means.
__________________
Current car
2000 Boxster 2.7l red/black
Previous cars
1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
|
|
|
|
|
10-07-2013, 08:04 PM
|
#12
|
|
Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
|
p0302 is a cylinder 2 misfire
__________________
James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow! 
Sold to a cool racer chick: 2004 986 S
YouTube channel: the PORSCHE as seen by NewArt
www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ?
|
|
|
|
|
10-10-2013, 04:38 AM
|
#13
|
|
Registered User
Join Date: May 2008
Location: Dickinson, TEXAS
Posts: 148
|
Still chasing that misfire! Must be the plug...
I swapped the coil out for a new one last night, (just had a few spare minutes to work on the car...)
Still misfiring on cyl 2. I checked all the rest of the cylinders, and they were fine. Just cylinder 2..
I intentionally did not pull the spark plug, becasue I am trying a systematic approach to eliminating the real problem. Tonight I will pull the plug and replace. When I isolate the problem, I will replace all of the coils and plugs.
__________________
Be careful, the car/girl/boat you just bashed is someone's pride and joy!
2001 Boxster S, 2007 Cayman SOLD, 2013 Abarth Cabrio
1970 Donzi 18 Holman Moody
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
All times are GMT -8. The time now is 04:42 PM.
| |
ROBIN
2001 Boxster Sport Classic
Linear Mode
