I have a std 5 speed nissan maxima SE 1998, and i change the ECU because when i got the car had the ECU from a automatic maxima so the check engine light it was on, because the car is std, so i change the ECU for another one from a Infiniti Q30 1996 std, and since i change de ECU the check engine light is on for the P0136 code wich is the rear oxigen sensor, but the sensor was working fine before this ECU, and i did replace the sensor 3 times already, what can i do?

Question edited for clarity and into written English and to what you thought you were saying.
Question moved to the correct category.

You have multiple issues (engine management, fuel management, ECM and BCM) that can only be diagnosed by an auto electrician with a pro grade $5,000 scan tool computer and the skill to use it.

https://www.google.com/search?q=auto+electrician+near+me

..

p0152 is bank 2 sensor 1 oxygen sensor code...make sure it was plugged back in or sensor may need replacement or you may have damaged the harness. p1564 is for the automatic speed control device basically the same possibilities with this circuit.

Relay is under the hood. Dash light could of burnt out. Check out Maxima.org

is it an auto transmission? if yes, there should be a problem with the troque convertor clutch....have it replaced...

1998 Nissan Maxima bluebird?
did not bluebird end in 1994?
ill answers for 1998 USA, if car is a JDM , well that be different

you have idle surge, (aka hunt)
the ECU controls idle at all times.
there are 10 or 2o things that can cause surge.
many tests. are you up for tests and buying tools, or just want a wild guess>?
1: EGR mains stuck open.
2: ISC stick (electric idle valve)
3: TPS switch ,not closed, at idle (that kills idle controls dead
4: lean AFR. and ISC has lost control or makes it hunt.
5: intake air leaks.
6: ECU in limphome. the USA cars (no location stated, bad)
all usa cars have OBD2 this year, ever use a $7 scan tool yet?
CEL stuck on running. never pulled the DTC errors?

ill stop here, there are 10 more. at least.

hit it with a hammer, and if that doesn't work hit it with a wrench.

there is a problem with your iginition timing. it is most probably overly advanced. have an experienced mechanic check your ignition timing. the mechanic should check the distributor, camshaft, and crankshaft timings.

I would look for a human holding a diagnostic analyzer to hook up to the car's interface to get the error
codes which point to the bad component or system. These people can be found at repair shops and dealer service departments.

El aviso de CHECK ENGINE enciende cuando alguno de los sensores esta advirtiendo un mal funcionamiento, Sugiero escanear el ECU.

P0400 is auxillary emmisions control and P0500 is vehicle speed idle speed control auxiliary inputs.