P0421 Warm Up Catalyst Efficiency Below Threshold Technical Description. Warm Up Catalyst Efficiency Below Threshold (Bank 1) What does that mean? Spinning My Wheels! ! P0421 Code Mitsubishi Galant My car is a 2003 Mitsubishi Galant 4cylinder. The service Mitsubishi 2003 Galant question P0421 is a diagnostic trouble code (DTC) for" Warm Up Catalyst Efficiency Below Threshold (Bank 1)".
This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or DTC P0421 applies to the warmup catalytic converter on the 2. 4L engines and the right bank (bank 1) of the 3. 0L engines. 2009 AT 1: 47 PM SKYKINGS44 MEMBER; I have a 2000 Galant V6. Where is the right bank bank one, and is it something I can replace without taking it to a mechanic?
Thanks for all your assistance. Find a car manual for Jul 23, 2010 I own a 2001 Mitsubishi Galant ES 4 cyl 2. 4l. I have a problem on the vehicle that truly bothers me: Code P0420 and P0421. A year ago i had the same Mitsubishi Galant Service and Repair Manuals. Every Manual available online found by our community and shared for FREE. Enjoy! Workshop Manual. Mitsubishi Galant 1999 Workshop Manual (368 Pages) (Free) Mitsubishi Galant 1999 Workshop Manual 3.
0L SOHC (9, 613 Pages) Mitsubishi Galant ES: Iam getting p0421 on my 1999 galant I'am getting p0421 on my 1999 galant which have miles. Check status of monitors and all say ready. Possible Causes and Repair Information for P0421 Mitsubishi code.
Learn what does P0421 Mitsubishi means? P0421 Mitsubishi Warm Up Catalyst Efficiency Below Threshold Cylinders 14 Hello, Ive had this P0421 code for the last couple of years and have passed at least 2 emissions inspections. The light has been on I have 2 codes on my car on. P0300 and P0421. 1999 Mitsubishi Galant with a 2003 rebuilt motor.
Car sometimes Answered by a verified Mitsubishi Mechanic Aug 05, 2012 Is yours a V6 (I think all 9G LS's are)? If so, the code P0421 refers to the warmup catalyst for the rear cylinder head, or bank, according to what my Haynes manual 1999 mitsubishi galant es engine light code P0421 Mitsubishi 1999 Galant question