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What does emssions code p0421 mean for a 2004 madza mpv

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Posted on Jan 02, 2017

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pippall
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SOURCE: Mazda mpv 2003 check engene light code p0421 warm up catalist ...

replace the air flow meter has this sounds like your problem.Good luck.

Posted on Jul 27, 2009

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SOURCE: I am getting a P0031, P1512, & P0421 code

P0031 - most likely pointing to a failed O2 sensor (bank 1 sensor 1 is located before the catalytic converter)

P0421 - failed catalytic converter or a failed O2 sensor

P1512 - intake manifold shutter valve is stuck - may be caused by the O2 sensor, but may not

I recommend replacing your O2 sensor first and see what happens

Posted on Sep 18, 2009

  • 1 Answer

SOURCE: Mazda MPV 2003, Engine light on, code P0421 - warm

could anyone please help me with this problem that i have with my 2001 mazda protege es 2.0. i have a bad catalyst converter and im waiting for the converter to come in, but before the guys that are fixing on my car relize that i need a converter they put a egr valve and a o2 senor and when the car idle some time it will just die one me. could someone tell me what is going on.

Posted on Dec 24, 2010

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SOURCE: my fan on my 2003 mazda mpv starts running as soon as i turn on the ignition. could this cause erractic codes

the temperature cooling sensor, The sensor's output is monitored by the engine computer to regulate various ignition, fuel and emission control functions, and to turn the radiator-cooling fan on and off as needed. check this first ! also check the fan relay in relay box. it may be sticking in the on position. hard to say without being there. but try the above things. good-day ! the fans come on if a/c is on.

Posted on Mar 17, 2012

  • 256 Answers

SOURCE: timing madza MPV

It is not adjustable, It is preadjusted buy the timeing belt when it is installed on the engine the timeing marks are on the engine block,

Posted on Dec 04, 2012

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2 Answers

P0421 CODES AND C1201


C1201 error code means that you have some problem in engine control system.

Possible causes for P0421 error
  • Warm Up Three Way Catalytic converter deterioration or malfunction
  • Exhaust system leaks
  • Loose front or rear HO2Ss
  • Faulty front heater O2 sensor
  • O2 sensors harness is open or shorted
  • O2 sensors poor electrical connection

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.

Apr 24, 2014 | Toyota Avensis Cars & Trucks

1 Answer

2002 mazda mpv sputtering


Error Code: P0421
Description:
Warm Up Catalytic Converter, Bank 1 - Efficiency Below Threshold
Possible Cause:
Warm Up Catalyst Bank 1 faulty.
Possible Solutions:
Check Warm Up Catalyst Bank 1 - Set Readiness.
Replace Warm Up Catalyst Bank 1.

Mar 04, 2014 | 1998 Toyota Corolla

1 Answer

What does the code 421 mean


the p0421 code on this vehicle is either caused by a bad catalytic converter or an oxygen sensor. your mechanic has a scan tool that he can verify if the converter is faulty by comparing the rear o2 sensor to the front sensor. If the rear o2 sensor's voltage is switching from rich to lean (01-1.0v) similar to the front's, then, it's a bad converter. The rear o2 sensor should keep a steady voltage reading. Have him do this test while at cruising speeds. good luck

Feb 28, 2014 | 2003 Mazda MPV

1 Answer

Timing madza MPV


It is not adjustable, It is preadjusted buy the timeing belt when it is installed on the engine the timeing marks are on the engine block,

Dec 04, 2012 | Mazda MPV Cars & Trucks

1 Answer

What if i replace my headgaskets and replaced my timing chains and resurfaces the heads want could make the my 2001 madza mpv minivan not start


It may be any number of things, but here's just a few:

1) Cam shaft position sensor incorrectly fitted or wiring faulty.
2) Compression incorrect due to over-skimming of the head.
3) Incorrect timing chain placement and/or faulty valve timing.

Nov 12, 2012 | 2001 Mazda MPV

1 Answer

My fan on my 2003 mazda mpv starts running as soon as i turn on the ignition. could this cause erractic codes


the temperature cooling sensor, The sensor's output is monitored by the engine computer to regulate various ignition, fuel and emission control functions, and to turn the radiator-cooling fan on and off as needed. check this first ! also check the fan relay in relay box. it may be sticking in the on position. hard to say without being there. but try the above things. good-day ! the fans come on if a/c is on.

Mar 17, 2012 | 2003 Mazda MPV

2 Answers

I am getting a P0031, P1512, & P0421 code


P0031 - most likely pointing to a failed O2 sensor (bank 1 sensor 1 is located before the catalytic converter)

P0421 - failed catalytic converter or a failed O2 sensor

P1512 - intake manifold shutter valve is stuck - may be caused by the O2 sensor, but may not

I recommend replacing your O2 sensor first and see what happens

Sep 18, 2009 | 2001 Mazda MPV

1 Answer

Mazda mpv 2003 check engene light code p0421 warm up catalist ...


replace the air flow meter has this sounds like your problem.Good luck.

Jul 27, 2009 | 2003 Mazda MPV

1 Answer

Fault code P0421


Aicux...I had the same problem with a Mitsubishi Montero Sport. The code refers to Warm up Catalytic Converter below threshold (Bank 1) which means the two oxygen sensors before and after the cat closest to the engine are showing a variance that is outside specifications. Bank 1 is on the side of cylinder 1.

I researched and found a cause that was NOT in the list of the usual causes. Generally, this code can be caused by the following:

1 Catalytic converter defective
2 Engine Misfire or similar
3 Large vacuum leak
4 Engine oil leakage into exhaust -valve guide seals, piston rings


I have learned to always look for the simplest solution before paying big bucks for things like catalytic converters, oxygen sensors, etc. I discovered my passengers side manifold was cracked. Took off the heat shield and could see the black residue from exhaust escaping the crack. Got a used manifold from partshotlines.com for $65 and installed it. Reset the code with my OBD-II device and code hasn't returned! Problem solved.

Not sure if this is what's wrong with your, but suggest you chek the simply stuff first. Good luck.



Sep 05, 2008 | 2000 Mazda MPV

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