The codes are p0106 p0421 p0401
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.
I had the same thing happen to me...fans would run even when car turned off. Was the thermostat. Got one with high temp-92* I think, it did the trick!
SOURCE: my 2005 mazda mpv's fan
A lot of times this will happen as the fans are not linked to the ignition switch at all. This is simply cooling the engine down with air. There's a thermal switch that tells the fans to turn on when the water reaches a certain temperature. At this temperature; the fans will engage causing an increase in cooling on your coolant system.
A lot of times this is just simply because of the weather, however, many other factors could be causing this problem. Overheating is a serious problem and should be dealt with quickly. However, usually this is just a sign of hotter temperatures.
This list is a possible set of variables you could be getting this from.
- Ambient (outside) temperature to high for cooling to effectively cool the engine while running
- Low oil causing increased friction within the engine.
- Old cooling fluid cannot provide adequate cooling
- Restricted radiator not allowing enough airflow to keep cooling system working properly
- Low cooling fluid or leak of some sort
- Overloaded vehicle (too much weight causing excessive stress on the engine)
- Binding transmission or brakes somewhere causing excessive stress on the engine
- Excessive throttle usage (driving it like a race car)
Those are some things that will make the engine run hot. It's most likely not running too hot for the engine, but however the cooling system just isn't able to control it to the point where the thermal switch turns the fans off and you must let it sit until they do switch off. As I said before, you most likely have no control over the fans unless you rewire them without the thermal switch engaging and disengaging them which I do not recommend doing.
SOURCE: DTC P0106 mazda protege. code came on, cleared
Check connections etc at MAP sensor. If all good, replace it. Erase codes & retry. How's vehicle running, idling, any black smoke out tailpipe?
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.
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
Hi
Please check the link to get a detailed idea about the code:-
http://www.obd-codes.com/p0421
Please get back to us if you have further query else please accept the suggestion.
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