Mazda 6 P0421. Mazda 3 purge control valve 911701 P0455 P0421 P0422 YouTube Under possible causes it lists exhaust gas leakage, A/F sensor and/or HO2S sensor looseness, TWC deterioration or malfunction and PCM malfunction I drive a 2007 Mazda 6, 4-cyl, CA Emissions with over 150,000 miles (I bought it with only 39,000)
The P0421 fault code is triggered by the Engine Control Module (ECM) when it detects that the rear HO2S (Heated Oxygen Sensor) value is getting closer to the value of the front HO2S My 2004 Mazda 6 diesel frequently slips out of 5th gear what is the most likely cause.
To learn the possible causes of P0421, read the next section 2.2M posts 103K members Since 2002 Mazda6club.com is a forum dedicated to the. I have a 07 mazda 6 4cyl with code p0421 which catylic converter i should change the one on top of bottom and do u have picture
Ошибка P0421 — Mazda 6 (3G) GJ, 2 л, 2014 года поломка DRIVE2. The P0421 code appears in a 2010 Mazda 6 2.5L because of the following conditions: Leakage exhaust system; Loose A/F sensor; Loose HO2S; TWC deterioration or malfunction; PCM malfunction; What are the Possible Causes of the P0421 Code? To diagnose and repair the root cause of the P0421 code in your Mazda 6, follow these steps: Verify the code: Use a scan tool to check for the P0421 code and any accompanying codes if present.; Inspect the oxygen sensors: Check the pre- and post-catalytic converter oxygen sensors for signs of damage, and use a scan tool to view their live data.
Отломился фланец глушака, вот наверное причина ошибки P0421 — Mazda 323. A P0421 happens when the downstream O2 sensor inverts its signal too quickly (basically matching the upstream O2 sensor) The computer reads this as a catalytic converter that is no longer reacting and just allowing un-catalyzed exhaust to pass by. P0421 is titled Warm up catalyst system efficiency below threshold in the Mazda repair manual