O2 Oxygen Concentration in the Exhaust Gas - Mazda 2.2 Diesel 2016

[zdarova]

I was wondering what is normal value for the O2 PID.
At idle and when the engine oil temp is 50°C, I have around 11.0 to 12.5 %.

I was searching and did not find what is correct value...

Car: Mazda cx-5 AWD 175 hp 2.2 Diesel with 137k km

[zdarova]

Update: I was asking this after poping out the P0154 error, especially when the engine is hot (÷85° C) and then decelerating, like going down from a hill.

Today I went to a friend workshop, he adviced me to by the Denso lambda sensor (130 euro).
Also he tried to clean it with some carbon cleaner and pressured air, and after install it back, I drove home and the error did not show.
When the news sensor arrives, I will install it.

Please note that after cleaning the sensor, the O2 % increased and it seems that the value of HO2S11 (in mA) is more variable, as for example I was able to see - 0.85 mA wrt before when quite all the values were possivile and above 0.50 mA.
Not sure about the impedance that stabilizes at 28 Ohm (at engine start it's around 400 Ohm).

The comment of my mechanic friend was: it's normal to change this sensor after 137k km...

[Karlitas]

Could a suction control valve (SCV) or a bad MAF sensor also be the cause of this triggered failure?
If:
Fuel rail pressure (preferred) - 350.50 bar;
Fuel rail pressure (absolute) - 310.10 bar;
Fuel rail pressure - 310.10 bar.

[boosted_diesel]

Update: I was asking this after poping out the P0154 error, especially when the engine is hot (÷85° C) and then decelerating, like going down from a hill.

Today I went to a friend workshop, he adviced me to by the Denso lambda sensor (130 euro).
Also he tried to clean it with some carbon cleaner and pressured air, and after install it back, I drove home and the error did not show.
When the news sensor arrives, I will install it.

Please note that after cleaning the sensor, the O2 % increased and it seems that the value of HO2S11 (in mA) is more variable, as for example I was able to see - 0.85 mA wrt before when quite all the values were possivile and above 0.50 mA.
Not sure about the impedance that stabilizes at 28 Ohm (at engine start it's around 400 Ohm).

The comment of my mechanic friend was: it's normal to change this sensor after 137k km...

Wideband oxygen sensors should usually last at least 160,000 km's. But it is not unheard of to see a failed wideband at 16,000 MILES in my experience although rare. Bear in mind an oxygen sensor senses oxygen so if its rather dirty it can read incorrectly. Also wide band and narrow band work differently so how you read the data is different voltage (narrow band) vs current (wide band). A new lambda could well cure it.


cheers

[boosted_diesel]

Could a suction control valve (SCV) or a bad MAF sensor also be the cause of this triggered failure?
If:
Fuel rail pressure (preferred) - 350.50 bar;
Fuel rail pressure (absolute) - 310.10 bar;
Fuel rail pressure - 310.10 bar.

Yes a faulty scv can cause pressure issues. The valve is required to control rail pressure. But do test all its circuitry before condemning it as rubbed wires are a demon.

cheers

[Karlitas]

Could a suction control valve (SCV) or a bad MAF sensor also be the cause of this triggered failure?
If:
Fuel rail pressure (preferred) - 350.50 bar;
Fuel rail pressure (absolute) - 310.10 bar;
Fuel rail pressure - 310.10 bar.

Yes a faulty scv can cause pressure issues. The valve is required to control rail pressure. But do test all its circuitry before condemning it as rubbed wires are a demon.

cheers

"Houston, we have a problem." And this is - P0154.
After clearing the errors and driving a couple of miles the error occurs again. The computer then switches the engine into emergency mode: engine power and revs are limited.

[Karlitas]

Is the lambda sensor bad or is the catalytic converter clogged?

[Karlitas]

Errors have been deleted, defects have been removed. I replaced the sensor, code DOX-0629 Denso. The engine runs smoothly.
(price ~93 eur, with discount ~79 eur.)

[Valiv1985]

I might be having the same issue P0154, but got a few other U codes as a bonus U0401, U0415 and U0433. Does a faulty o2 sensor on this model trigger communication errors? I wonder if in my case is the O2 sensor or anything else. I replaced the sensor with an aftermarket one, all looked good for 20 miles but seems like the errors came back today. With the old sensor though it never took more than 2 miles drive to get the dash lit up, so I guess it's an improvement. Has anyone had issues with aftermarket o2 sensors that have been sorted out with oem?

[Karlitas]

I might be having the same issue P0154, but got a few other U codes as a bonus U0401, U0415 and U0433. Does a faulty o2 sensor on this model trigger communication errors? I wonder if in my case is the O2 sensor or anything else. I replaced the sensor with an aftermarket one, all looked good for 20 miles but seems like the errors came back today. With the old sensor though it never took more than 2 miles drive to get the dash lit up, so I guess it's an improvement. Has anyone had issues with aftermarket o2 sensors that have been sorted out with oem?

When it comes to electronic equipment, it's better not to buy aftermarket products. You know, "A miser pays twice."