Check Engine Light on... CRAP!!!
Thread Starter
Lead Lap
Joined: Jun 2006
Posts: 495
Likes: 0
From: Dallas, TX
Check Engine Light on... CRAP!!!
My check engine light just turned on recently. Just hit 115K miles on my SC430 a few weeks ago. Is there a service that I'm missing? Running absolutely fine, oil change recently as well. Wanted to inquire before I took it to a shop! Thanks!
Rookie
Joined: Jun 2010
Posts: 74
Likes: 0
From: California
Haven't had it happen to any of my Lexus so far. But from personal experience with my 996 Carrera, the Check Engine Light (CEL) indicated a MAF malfunction which read as an O2 sensor failure. On my Mercedes E430, CEL's were usually from O2 sensor malfunctions or ignition malfunctions, never from a "service pending."
GL with your diagnosis.
GL with your diagnosis.
Rookie
Joined: Mar 2010
Posts: 64
Likes: 0
From: texas
Toyotas are very bad about this....it has to do with the fuel system....
I posted somewhere else about this recently
do teh unplug battery attack.....
https://www.clublexus.com/forums/sc-...ght-sc430.html
I posted somewhere else about this recently
do teh unplug battery attack.....
https://www.clublexus.com/forums/sc-...ght-sc430.html
Joined: Feb 2001
Posts: 31,944
Likes: 2,738
From: North Carolina
Loose gas cap is the first (and easiest) thing to look at. CEL issues half the time other than the gas cap seem to be an O2 sensor.
May be able to take it to a local parts shop and get the code read for free.
May be able to take it to a local parts shop and get the code read for free.
Rookie
Joined: Mar 2010
Posts: 64
Likes: 0
From: texas
yep, but they almost always will NOT reset, just unplug battery and start over....if the light comes back on, then worry over what the codes are reading...
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Thread Starter
Lead Lap
Joined: Jun 2006
Posts: 495
Likes: 0
From: Dallas, TX
Went by the local autozone and they hooked it up to the scanner. They printed out two little slips that identify the problem, though it doesn't make much sense to me.
here they are, maybe someone can shed some light:
TROUBLESHOOTING P0446
DEFINITION: EVAP (evaporative emission system) system vent control circuit
TROUBLESHOOTING P0446
DEFINITION: EVAP system incorrect purge flow
here they are, maybe someone can shed some light:
TROUBLESHOOTING P0446
DEFINITION: EVAP (evaporative emission system) system vent control circuit
TROUBLESHOOTING P0446
DEFINITION: EVAP system incorrect purge flow
Pole Position
Joined: Dec 2009
Posts: 3,135
Likes: 277
From: CA - San Diego
I couldn't find a 446 error I did find 443 which covers the EVAP purge. This may be simple as Bon mentioned a loose vacuum line or little more complex.
Last edited by VVTiBob; Jul 26, 2010 at 01:22 PM.
Driver
Joined: Aug 2007
Posts: 116
Likes: 1
From: nv
SOME TIME CARS WILL GET ACtUALLY GAS IN TO THE EVAP CANNISTER, IF YOU FILL YOUR tank to much like topping it off when its already full then adding a bit more to top it off. p.s sorry bout the caps
Thread Starter
Lead Lap
Joined: Jun 2006
Posts: 495
Likes: 0
From: Dallas, TX
Damn! I do this all the time. Will have to cut it out. Will take the car to my local toyota guy to see if they can fix it.