Check Engine Light after Oil Change
07-01-2008 | 01:28 AM
#16
Burning Brakes
Joined: Sep 2007
Posts: 803
Likes: 5
From: Los Angeles / Montreal
07-01-2008 | 10:01 PM
#17
Race Director
Joined: Sep 2006
Posts: 19,034
Likes: 255
From: Centerton, AR
Had some DTCs showing up over time that at first suggest MAF...
Hey Guys,
This is the second time where I've had an oil change done and my CEL comes on later that day. The 1st time, the dealer said the cap was loose and asked if I had tinkered with it (???).
It's now Friday night, so I can't go back to the dealer until Monday. I'm assuming it's the same problem. I tried tightening the cap, but it seems tight to me. Is there a trick to securing the cap that I should be aware of?
Thanks!
This is the second time where I've had an oil change done and my CEL comes on later that day. The 1st time, the dealer said the cap was loose and asked if I had tinkered with it (???).
It's now Friday night, so I can't go back to the dealer until Monday. I'm assuming it's the same problem. I tried tightening the cap, but it seems tight to me. Is there a trick to securing the cap that I should be aware of?
Thanks!
Finally co-worker noticed (heard -- I'm a bit hard of hearing) air leaking past oil tube filler cap (while engine idling of course). One could then wiggle the cap and hear the air leak sounds change.
Replaced cap. $13. No more DTCs. Oh, cap felt sort of tight/good but any wiggle is grounds for suspicion and of course any noise of air rushing past/around cap is grounds to at least replace cap.
More recently, spotted some moisture on trunk lid over engine fluids area (oh, car is an 02 Boxster). Replaced coolant cap and dried all moisture and no more moisture.
My Boxster has just over 193,000 miles and I've replaced more oil tube filler caps (1) and coolant caps (1) and AOS (2) than engines! Original engine. Original clutch.
Sincerely,
Macster.
07-01-2008 | 10:19 PM
#18
Drifting
Joined: May 2006
Posts: 2,442
Likes: 3
From: Another Ex pat Brit in SoCal
Finally replaced MAF. DTCs came back.
Finally co-worker noticed (heard -- I'm a bit hard of hearing) air leaking past oil tube filler cap (while engine idling of course). One could then wiggle the cap and hear the air leak sounds change.
Replaced cap. $13. No more DTCs. Oh, cap felt sort of tight/good but any wiggle is grounds for suspicion and of course any noise of air rushing past/around cap is grounds to at least replace cap.
More recently, spotted some moisture on trunk lid over engine fluids area (oh, car is an 02 Boxster). Replaced coolant cap and dried all moisture and no more moisture.
My Boxster has just over 193,000 miles and I've replaced more oil tube filler caps (1) and coolant caps (1) and AOS (2) than engines! Original engine. Original clutch.
Sincerely,
Macster.
Finally co-worker noticed (heard -- I'm a bit hard of hearing) air leaking past oil tube filler cap (while engine idling of course). One could then wiggle the cap and hear the air leak sounds change.
Replaced cap. $13. No more DTCs. Oh, cap felt sort of tight/good but any wiggle is grounds for suspicion and of course any noise of air rushing past/around cap is grounds to at least replace cap.
More recently, spotted some moisture on trunk lid over engine fluids area (oh, car is an 02 Boxster). Replaced coolant cap and dried all moisture and no more moisture.
My Boxster has just over 193,000 miles and I've replaced more oil tube filler caps (1) and coolant caps (1) and AOS (2) than engines! Original engine. Original clutch.
Sincerely,
Macster.
Also coolant tank #2 FWIW - 90,000 miles on original clutch (so far!)
07-05-2008 | 02:35 PM
#19
Thread Starter
Advanced
Joined: Sep 2006
Posts: 84
Likes: 0
From: Vancouver, BC
Just to bring closure on this one...
Brought the car in the other day. The CEL was due to engine misfires. It was just a coincidence that it happened at the same time as my oil change.
Ended up changing the ignition coil on one of the cylinders.
Thanks to all for the advice.
Brought the car in the other day. The CEL was due to engine misfires. It was just a coincidence that it happened at the same time as my oil change.
Ended up changing the ignition coil on one of the cylinders.
Thanks to all for the advice.
