Toyota Yaris Forums - Ultimate Yaris Enthusiast Site
 

 


 
Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Technical Forums > DIY / Maintenance / Service
  The Tire Rack

Reply
 
Thread Tools Display Modes
Old 04-26-2011, 06:55 PM   #1
bigbodie
 
Drives: Toyota Yaris CDX
Join Date: Apr 2011
Location: IOW
Posts: 2
EMS Warning Light (1999 Yaris)

I've been having a problem with my Yaris and I can't quite make out what is the problem.

The EMS warning light keeps illuminating from time to time, sometimes it goes off on its own accord but then comes back on, to add to that the engine idles in a strange way, to the point where you can hear the engine noise from the cockpit. At speeds she is fine, but I am finding the gear changing a bit lumpy when I put the gas back down...

It's merely a hunch, but I'm guessing the culprit could be a faulty/weak spark plug. But until I get the invoice from my last service I cannot be too sure

Could anyone give me a rough suggestion please?
bigbodie is offline   Reply With Quote
Old 04-26-2011, 08:37 PM   #2
Bluevitz-rs
1NZ-6spd
 
Bluevitz-rs's Avatar
 
Drives: '05 6-Spd Vitz RS
Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,966
By EMS light, are you referring to the check engine light?

It's possible you might have an O2 sensor on it's way out.
Bluevitz-rs is offline   Reply With Quote
Old 04-27-2011, 04:55 AM   #3
bigbodie
 
Drives: Toyota Yaris CDX
Join Date: Apr 2011
Location: IOW
Posts: 2
Yes the check engine light sorry. So how does an O2 sensor effect the engines performance? I'm not a highly knowledgeable mechanic sorry XD
bigbodie is offline   Reply With Quote
Old 04-27-2011, 08:08 AM   #4
Bluevitz-rs
1NZ-6spd
 
Bluevitz-rs's Avatar
 
Drives: '05 6-Spd Vitz RS
Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,966
The O2 sensor measures how much gas/air mix that was burn inside the motor. If the readings aren't right it will effect how much gas will get injected.

If you can, bring your car to a parts store and have them check the codes. If the light has come on, there should be codes in the history and it should tell us what's going on more clearly.
Bluevitz-rs is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
NEWS: TOYOTA REVEALS ALL-NEW YARIS SEDAN AT 2006 LOS ANGELES AUTO SHOW VitzBoy General Yaris / Vitz Discussion 7 09-20-2023 07:50 AM
How many forum posters does it take to change a light bulb? silver_echo Off-topic / Other Cars / Everything else Discussions 25 06-27-2011 01:50 AM
Engine warning light Yollander General Yaris / Vitz Discussion 9 01-12-2011 11:19 AM
2007 Yaris Pricing Info ! YarisBueller New YARIS Purchase Forum 104 06-24-2009 04:54 PM


All times are GMT -4. The time now is 10:48 AM.




YarisWorld
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.