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What does engine code P0421 mean?
P0421 code = Warm up catalyst efficiency below threshold, Bank 1
What is code p0421?
P0421 : Warm up catalyst efficiency below thresh hold bank 1
Mazda Millieum S 2000 emission code P0421?
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
Mazda 2001 protege lx P0421 error code?
Trouble code P0421 means:Warm up catalyst system efficiency below threshold
P0421 check engine code on 2001 Mazda 626?
Trouble code P0421 means:Warm up catalyst system efficiency below threshold
What is OBDII code P0421?
P0421 : Warm up catalyst efficiency below thresh hold bank 1
What is 1999 Mazda Miata check engine light code P0421?
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
1998 Mazda 626 p0421?
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
Ow do you correct the Check engine light on your 1998 Mazda protage with the code of p0421?
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
What does dtc code p0421 on Mitsubishi montero mean and is this an emergency?
When this code come out may be haven no enough warm up on the catalyst is efficienecy the vehicle has an exhaust leak
What is code p0421 on audi a6 2002 3.0 bank 1 02 sensor?
Passenger side and after the catalytic converter O2 sensor.
What is code p0421 in a Hyundai Sonata 2003?
If your looking just for what it means it says: Warm up Catalyst Efficiency Bank 1 Below Threshold I am looking up how to fix it and so far I think it says to replace the O2 Sensor but I'm doing more research.
