P0421 Mazda 6 Forums

Mazda 6 P0421. Q&A Mazda P0421 and P0431 OBD2 Codes Intake Manifold Actuator & Water 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 Under possible causes it lists exhaust gas leakage, A/F sensor and/or HO2S sensor looseness, TWC deterioration or malfunction and PCM malfunction

My 2004 Mazda 6 diesel frequently slips out of 5th gear what is the most likely cause. Unfortunately, the P0421 is a fairly straight forward code, and a fairly common problem

How to clear your engine light after upstream bank 1 oxygen sensor

Under possible causes it lists exhaust gas leakage, A/F sensor and/or HO2S sensor looseness, TWC deterioration or malfunction and PCM malfunction This code is typically set when the vehicle is traveling at a speed between 25 and 60 miles per hour, with a load of 22 to 45 percent, and the engine speed is. 6 = Presilencer (resonator) - not pictured on OEM exhaust but would bolt directly downstream from bank 1 TWC

Mazda 3 purge control valve 911701 P0455 P0421 P0422 YouTube. This code points to a failing Warm-Up Catalytic Converter As sensors age and reach the end of their lifespan (50,000mi for a 2 lead, 70,000mi for a 3-lead, 100,000mi for a 4 lead) or (0.1V-1.0V response > 300 milliseconds) they.

P0421 and P0431 code Mazda 6 Forums. P0421 is titled Warm up catalyst system efficiency below threshold in the Mazda repair manual 6 = Presilencer (resonator) - not pictured on OEM exhaust but would bolt directly downstream from bank 1 TWC