5S-FE MK2 Non-Turbo Engine CEL - error code 21
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Toyota MR2 Generations
MK 2 MR2 - SW20
5SFE: CEL - error code 21
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 5 of 5 Thread: CEL - error code 21 Thread Tools Show Printable Version Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 07-27-2015, 07:45 PM #1 GTX View Profile View Forum Posts Private Message View Blog Entries No Skills Join Date Feb 2015 Location Tulsa, Oklahoma Posts 14 Thanks 0 Thanks 0 Thanked in0 Posts Total Contributions For
GTX $ 0.00 CEL - error code 21 My CEL light just came on today. I did the paper clip error code diagnostic and found code 21 stating oxygen sensor. I have two questions...1: how many sensors is in the 1991 mr2 2.2NA and 2: where are they located?
I am a newbie to mr2 so a pic showing location would help tremendously.
Thanks in advance. Reply With Quote 07-28-2015, 12:47 AM #2 MR2 T'd View Profile View Forum Posts Private Message View Blog Entries Reanimating C.H.U.D. Join Date Mar 2013 Location so cal, West L.A. Posts 120 Thanks 19 Thanks 1 Thanked in1 Post Total Contributions For
MR2 T'd $ 0.00 d posted Last edited by MR2 T'd; 07-28-2015 at 12:54 AM. Reply With Quote 07-28-2015, 12:53 AM #3 MR2 T'd View Profile View Forum Posts Private Message View Blog Entries Reanimating C.H.U.D. Join Date Mar 2013 Location so cal, West L.A. Posts 120 Thanks 19 Thanks 1 Thanked in1 Post Total Contributions For
MR2 T'd $ 0.00 There are 1 or 2/ 02 sensors ( depends if it's CA emissions)...
Both located in the exhaust manifold/CAT...
Main 02 is on top...
Sub 02 (CA emissions) is on the bottom Reply With Quote 07-28-2015, 08:27 AM #4 GTX View Profile View Forum Posts Private Message View Blog Entries No Skills Join Date Feb 2015 Location Tulsa, Oklahoma Posts 14 Thanks 0 Thanks 0 Thanked in0 Posts Total Contributions For
GTX $ 0.00 Originally Posted by MR2 T'd There are 1 or 2/ 02 sensors ( depends if it's CA emissions)...
Both located in the exhaust manifold/CAT...
Main 02 is on top...
Sub 02 (CA emissions) is on the bottom Thank you! Assuming CA stands for California emissions, I am not in CA so I think I just have that main one on top. I am going replace this one today and see if the cel goes away. Reply With Quote 07-31-2015, 09:39 AM #5 GTX View Profile View Forum Posts Private Message View Blog Entries No Skills Join Date Feb 2015 Location Tulsa, Oklahoma Posts 14 Thanks 0 Thanks 0 Thanked in0 Posts Total Contributions For
GTX $ 0.00 ***UPDATE***
I received the 02 sensor yesterday and replaced the old one. Drove around the block and the CEL light went off. Hope this will help others with cel light error code 21. Reply With Quote « Previous Thread | Next Thread » Posting Permissions 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 [VIDEO] code is On HTML code is Off
Copyright © 2026 vBulletin Solutions Inc. All rights reserved. Copyright © 2004-2017 - East Coast Imports, LLC
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 5 of 5 Thread: CEL - error code 21 Thread Tools Show Printable Version Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 07-27-2015, 07:45 PM #1 GTX View Profile View Forum Posts Private Message View Blog Entries No Skills Join Date Feb 2015 Location Tulsa, Oklahoma Posts 14 Thanks 0 Thanks 0 Thanked in0 Posts Total Contributions For
GTX $ 0.00 CEL - error code 21 My CEL light just came on today. I did the paper clip error code diagnostic and found code 21 stating oxygen sensor. I have two questions...1: how many sensors is in the 1991 mr2 2.2NA and 2: where are they located?
I am a newbie to mr2 so a pic showing location would help tremendously.
Thanks in advance. Reply With Quote 07-28-2015, 12:47 AM #2 MR2 T'd View Profile View Forum Posts Private Message View Blog Entries Reanimating C.H.U.D. Join Date Mar 2013 Location so cal, West L.A. Posts 120 Thanks 19 Thanks 1 Thanked in1 Post Total Contributions For
MR2 T'd $ 0.00 d posted Last edited by MR2 T'd; 07-28-2015 at 12:54 AM. Reply With Quote 07-28-2015, 12:53 AM #3 MR2 T'd View Profile View Forum Posts Private Message View Blog Entries Reanimating C.H.U.D. Join Date Mar 2013 Location so cal, West L.A. Posts 120 Thanks 19 Thanks 1 Thanked in1 Post Total Contributions For
MR2 T'd $ 0.00 There are 1 or 2/ 02 sensors ( depends if it's CA emissions)...
Both located in the exhaust manifold/CAT...
Main 02 is on top...
Sub 02 (CA emissions) is on the bottom Reply With Quote 07-28-2015, 08:27 AM #4 GTX View Profile View Forum Posts Private Message View Blog Entries No Skills Join Date Feb 2015 Location Tulsa, Oklahoma Posts 14 Thanks 0 Thanks 0 Thanked in0 Posts Total Contributions For
GTX $ 0.00 Originally Posted by MR2 T'd There are 1 or 2/ 02 sensors ( depends if it's CA emissions)...
Both located in the exhaust manifold/CAT...
Main 02 is on top...
Sub 02 (CA emissions) is on the bottom Thank you! Assuming CA stands for California emissions, I am not in CA so I think I just have that main one on top. I am going replace this one today and see if the cel goes away. Reply With Quote 07-31-2015, 09:39 AM #5 GTX View Profile View Forum Posts Private Message View Blog Entries No Skills Join Date Feb 2015 Location Tulsa, Oklahoma Posts 14 Thanks 0 Thanks 0 Thanked in0 Posts Total Contributions For
GTX $ 0.00 ***UPDATE***
I received the 02 sensor yesterday and replaced the old one. Drove around the block and the CEL light went off. Hope this will help others with cel light error code 21. Reply With Quote « Previous Thread | Next Thread » Posting Permissions 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 [VIDEO] code is On HTML code is Off
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5S-FE MK2 Non-Turbo Engine, emissions, located, manifold/cat, bottom, main, exhaust, code, error, depends, sensors
- My CEL light just came on today. I did the paper clip error code diagnostic and found code 21 stating oxygen sensor. I have two questions...1: how many sensors is in the 1991 mr2 2.2NA and 2: where are they located?
I am a newbie to mr2 so a pic showing location would help tremendously.
Thanks in advance.