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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » 02 sensor graph, labels incorrect?

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Author Topic: 02 sensor graph, labels incorrect?
gerardooy
Member
Posts: 1
Post 02 sensor graph, labels incorrect?
on: September 8, 2017 (GMT)

hi guys,
I did graph both upstream and downstream sensor on my car. btw, I have not codes.

    o2 bank 1 sensor 1 is kind of steady
    o2 bank 1 sensor 2 fluctuates.

I would expect the other way around.

Could this be an app bug or something really bad is going on

This is a 04 nissan sentra 1.8 car.
Thanks,
F-150Torqued
Member
Posts: 437
Post Re: 02 sensor graph, labels incorrect?
on: September 10, 2017 (GMT)

Without codes, what you expect seems readonable.

Fortunately – with the phenomenal power and flexibility of Torque Pro, it will help you sort out whether your PID list is addressing the incorrect sensors or whether their Acronyms are ‘reversed’. Without codes, I doubt they are wired backwards. Since those sensors are among the Federally mandated ones with known PID assignments, just add your own custom PID for O2S11 and O2s12 (uniquely named from current ones) and compare their readings to your current results.

PID: 0x0013 = Oxygen Sensors Present, where response is bit mapped, bits [A0..A3] == Bank1 Sensors 1-4, bits [A4..A7] == Bank 2 Sensors 1-4

PID: 0x0014 = Oxygen Sensor 1, where response is in byte A, Equation == A/200

PID: 0x0015 = Oxygen Sensor 2, where response is in byte A, Equation == A/200

In both PIDs 0014 & 0015, response byte B is corresponding fuel trim with equation 100/128*B-100

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