![]() 11/25/2018 at 20:05 • Filed to: None | ![]() | ![]() |
![]() 11/25/2018 at 20:21 |
|
My dad has a MkIV that has never seen a CEL or a single unexpected repair in 14 years and 60k miles . It’s a fucking VR6 unicorn. And it’s worth about 2/3 of what he paid. The clutch is at 90% and brakes at 80% as of last week.
Welcome to VW bizarro world.
![]() 11/25/2018 at 20:21 |
|
This is now a car meme thread.
![]() 11/25/2018 at 20:37 |
|
As someone whose Ranger has an intermittent catalyst efficiency code, I can sympathize.
(seriously, how do you have an intermittent catalyst code?)
![]() 11/25/2018 at 20:38 |
|
Why does this picture hurt me
![]() 11/25/2018 at 20:45 |
|
becuz
![]() 11/25/2018 at 20:52 |
|
RIP aperson
![]() 11/25/2018 at 20:52 |
|
Easy fix, remove the catalytic converter.
![]() 11/25/2018 at 21:15 |
|
unfortunately this is the bank 2 catalyst which connects to the pipe going all the way back to the truck. ISTR that if there’s a leak downstream of the catalyst (say, at a joint/coupling) it can pull in air and trigger a catalyst efficiency code.
![]() 11/25/2018 at 22:19 |
|
Circuit damage?
![]() 11/25/2018 at 22:36 |
|
I really wanted a mk6 GTI for my wife’s car but we didn’t want to spend that much.
![]() 11/25/2018 at 22:54 |
|
I doubt it. the upstream (engine management) O2 sensor is supposed to rapidly oscillate between slightly rich and slightly lean, to make sure the oxidation and reduction catalysts are being fed a gas stream which lets them work optimally. the downstream (catalyst monitor) O2 sensor is not supposed to oscillate much if at all. if the downstream O2 sensor is bad, it won’t oscillate. a catalyst efficiency code means the downstream O2 sensor is oscillating too similarly to the upstream O2 sensor and indicates the catalyst is not working .
I’m just trying to think of situations where a catalyst could stop working, then start working.
![]() 11/25/2018 at 23:37 |
|
Huh. O2 sensor systems are one of those things I never really got around to learning about. Is the PCM not expecting a specific operating range? Is it satisfied (in terms of catalyst efficiency) just as long as the upstream and downstream sensors are reading differently, regardless of what those values actually are? Is it not possible for a bad sensor or bad wiring to errantly report cat inefficiency without triggering other O2 codes?
![]() 11/26/2018 at 04:46 |
|
from some one with a 15 year old Mitsubishi with 700k km and never had a CEL
HA-HA (Nelson Muntz voice)
![]() 11/26/2018 at 07:08 |
|
O2 sensor(s)?
![]() 11/26/2018 at 07:08 |
|
#VWLyfe
![]() 11/26/2018 at 08:59 |
|
The CEL is how you know it’s on.
But actually, when my Mk3 was new to me before I fixed the radio, I had headphones in like an idiot and stalled, and the tip off that it was stalled was the CEL turn ed off. Well that and it stopped shaking.