ENGINE SYSTEM FAILURE

[gadim]

Hi

I got this warning according I reset the error but it will return after 2-3 days.
ECU report these possible causes:
Do yo have idea I can find the problem cause?

P1173

The ECU has run out of range in adapting the mixture in reference to the O2 Sensor signal (multiplicative adaptation) and/or in reference to the engine running conditions (additive adaptation).
Possible causes:
- Engine Temperature sensor/circuit defective, but the signal still in realistic range.
- Fuel Pressure incorrect
- Fuel Injector(s) leaking
- Fuel Injectors clogged
- Incomplete combustion (ignition or compression problem, excess O2 in the exhaust)
- Vacuum leak (lean mixture)
- Oxygen Sensor defective or contaminated with silica (Voltage change extremely slow)
- Exhaust system leak upstream of the O2 Sensor (stray air brings extra O2 making the mixture to appear lean)
- Fuel Evaporation Control system defective
- vehicle driven out of fuel (tank empty)
The reason for this fault is that ECU has received very high signal from the sensor. The fault is present now. Take appropriate action to fix this sensor fault. Dashboard warning light was activated for this fault.

[alfa156sarajevo]

Do you have name of "P1173" error?
I can see you have description of the error but there is no full name of the error...

Can you give us more details of the car: brand, model, year, engine, petrol, diesel...
Did you remap (tuned) the car?

[gadim]

The CAR Is GT JTS Selespeed 2.0
I use free version of Multi ecu scan

This is the all info that I got the car is acting well no back fires everything is usual, is it engine problem or one of O2 sensor?
I appreciate your help

ERROR DETAILS:
Engine temperature: 91.5 °C
Engine speed: 1560 rpm
Engine load: 25.50 %
Air temperature: 57.0 °C
Throttle position: 4.71 %
Battery voltage: 13.014 V


The ECU has run out of range in adapting the mixture in reference to the O2 Sensor signal (multiplicative adaptation) and/or in reference to the engine running conditions (additive adaptation).
Possible causes:
- Engine Temperature sensor/circuit defective, but the signal still in realistic range.
- Fuel Pressure incorrect
- Fuel Injector(s) leaking
- Fuel Injectors clogged
- Incomplete combustion (ignition or compression problem, excess O2 in the exhaust)
- Vacuum leak (lean mixture)
- Oxygen Sensor defective or contaminated with silica (Voltage change extremely slow)
- Exhaust system leak upstream of the O2 Sensor (stray air brings extra O2 making the mixture to appear lean)
- Fuel Evaporation Control system defective
- vehicle driven out of fuel (tank empty)
The reason for this fault is that ECU has received very high signal from the sensor. The fault is present now. Take appropriate action to fix this sensor fault. Dashboard warning light was activated for this fault.

[gadim]

Hi

I revisit the Error it says

P1173 - Mixture 1 Strength Additive

I also monitor the graph it looks that one of the sensors post CAT is not following the pre cat the signal is too low
I can send you the graph

Regards,
-Gadi

[alfa156sarajevo]

Since MES did wrote in detail what could be the problem there is nothing else to write about it.

Can you give me minimum and maximum values of both lambda sensors (O2 sensors) before catalyst and after catalyst?

[gadim]

Hi,

The Max value for Sensor 1 before catalyst is 4.5V down to 0.5V
The Max value for Sensor 2 before catalyst is 4.5 down to 0.3V
I didnt measure post catalyst
Is the above OK I read it should not exceed 0.8
http://www.picoauto.com/applications/lambda-sensor.html

[alfa156sarajevo]

In general all lambda sensors (O2 sensors) should work between 0V and 0,9V.
If value exceeds more then 1V it means that is not working correctly and it is probably dying slowly.
If value is fixed on permanently, for example on 0,5V it means that is totally dead.
These are values for standard lambda (O2) sensors.

In some cases you can find titania lambda sensors. They are very rear.
Maybe some 3.2 GTA engines do have them but I do not know for sure.
Those titania sensors have different values but again they should not have exceeded more than 5V.

[CaptainSlarty]

Hi Sir
Check the air temp sensor in the airflow meter.

Cap.