110 C (230 F) is when the radiator fan should kick into high speed. If the fan is not running at 104 C (220 F), it has a problem with the relay, resistor, fan, or the control circuit. Anything above 110 C may blow the head gaskets. If the temperature reaches 121 C (250 F) the heads are almost assuredly blown.

You should check for any leaks. Top off the radiator and the recovery bottle. Be sure to open the bleeder screw on the thermostat to make sure no air is trapped behind the thermostat. If you have no leaks and your fan is coming on, you might have a stuck shut thermostat.

 

thanks for answering, indeed the normal ignition at 104 °C without any problem, but this cycle does it only when you don't have the A/C, another detail that I forgot to mention is that this only happens when the A/C is on . It has no leaks, and the thermostat has not been changed for more than 3 months, in short, everything is fine in that regard. What I do not understand is why the RPM and temperature rise too. What I don't understand is the following, when it mentions that it works at high speed, is that the fan must be faster or is it more time to turn on, and if so, where could I see a relay or something that does not make it work in "high"?

 

the scanner reads this codes :
P0133
P0456
P0430

 

P0430 may be the cause of your overheating. Bad cats often run very hot.

 

So is this all caused by an oxygen sensor or can it be caused by one?

 

P0430 can be caused by a bad O2 sensor, but it can also cause O2 sensors to fail when they get too hot. But you only have a code for the upstream on the other bank, so it wouldn't be related to the O2 code (P0133).

You will likely need to replace both the B1S1 O2 and B2 cat.

 

Understood, so I'll take it to my mechanic soon to do it. The other thing would be, does it have something to do with the catalyst or is it far from that topic?

 

"cat" is short for "catalytic converter". It's the same part. Just some English slang that's common among car guys.

The O2 sensors measure the fuel and air mixture going into and coming out of the cat. The downstream O2s exist only to monitor the condition of the cat. Upstreams determine the fuel mixture.

 

perfect, the concept of "cat" is clearer to me. Thanks for that!

So in a few words, it would be to check those sensors in the banks that you mention to see how it reacts, and if it continues the same then we would be talking about the fact that the cat is seriously defective and should be replaced

 

Yes, but it's a little more involved than that.

Bank 1 sensor 1 is the only one you have a code for (P0133), so definitely replace that one.

Bank 2 sensor 2 is the one that determines whether to set the P0430. It may be defective and causing the code, but it is more likely a cat issue. Check that you do not have any exhaust leaks near it before replacing anything, since those can interfere with the sensor's readings.

 

If I understand why it is more complicated, then I will proceed to change if or if in B1S1 I think I know which ones, in fact it has a green color around the sensor (I suppose it is a bad signal or a lot of humidity in the environment) and I will have them check if does it have leaks or something similar or if the cat is definitely bad

 

B1S1 is the upper rear. B2S2 is the lower front.

 

perfect, when I have results I will commit it again in this post so that we can see what is next or if it is solved. Thank you very much for your knowledge, patience and empathy.