Question about Toyota Corolla
Posted by Anonymous on
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
SOURCE: P0421 CODES AND C1201
C1201 error code means that you have some problem in engine control system.
Possible causes for P0421 error
The P0421 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem.
Posted on Apr 24, 2014
Tips for a great answer:
Jan 04, 2018 | Lexus Cars & Trucks
May 29, 2017 | Toyota Cars & Trucks
Feb 21, 2016 | Cars & Trucks
Oct 02, 2014 | 2009 Toyota Corolla
Apr 24, 2014 | Toyota Avensis Cars & Trucks
Jan 22, 2013 | 2005 Toyota Highlander
18 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: