I just received a Stop Start System Fault - O2 Sensor Error..SOLVED
Posted: Tue Aug 16, 2022 2:03 pm
TBH with my car at 15.5Kmiles and vintage 2017 I didn't expect this event. So I get the SS System Error and orange EML....and that alone.
Benefit No 1. Stop/Start now fails to operate and leaves me in peace..... Car appears to run normally with less complication.
1st Observation: (Day 1)
Stop/Start indicator Lamp Blinking (Not blink = No malfunction)
No other faults visible by eye.....hope scanner can pick up all DTCs raised
1st OBD Scan: (Day 2)
PERMANENT (errors):
P0037 - H02S Heater Control Circuit Low
P0138 - O2 Sensor Circuit High Voltage
If those DTC's are correct then fault according to the internet is any one or more of these..Wiring, H02S heater, ECM, Fuel/Intake, Injector.
We know something about this O2 sensor game I think. If memory serves its the heating of same thats been a problem.
I'm using an OBDLink LX Bluetooth Scanner which may be able to monitor the O2 sensor function?
Repair Decision: (Day 3)
Considered booking into distant Nissan garage..No. Decided to use nearby ATS Euromaster as I know them. So next Tues its a diagnostic with a Bosch KTS200 Scanner of theirs. Hopefully it'll confirm my generic scanner detection as above. The DTC definitions shown above relate to an MR20DD 2L petrol engine which is not my 1.6 and hopefully (again) there has been an SAE standard applied....
Interesting that its a Bosch Scanner because I expect most of the vehicle electronics (ECU etc) is from Bosch...Nissan don't design/produce that stuff.
Repair Decision: (Day 4)
Bosch OBD Tester above at Euromaster confirmed my findings with a generic scanner. Fault is on Heated O2 Sensor that is installed after the Cat Converter. Being identified as Bank 1, Sensor 2. Have not tested the sensor but suspect the heater element has failed. That prevents the sensor working at the correct temperature..approx 300 deg C.
Now considering whether to replace it myself or goto Nissan. Am unsure of the re installation setup procedure which relates to the ECU learning the performance characteristics of a new HO2 sensor (H = Heated).
The procedure relates to running the engine from normal running temperature..approx 3k revs for 2 minutes. I had done similar on a BMW some years ago...successfully.
Benefit No 1. Stop/Start now fails to operate and leaves me in peace..... Car appears to run normally with less complication.
1st Observation: (Day 1)
Stop/Start indicator Lamp Blinking (Not blink = No malfunction)
No other faults visible by eye.....hope scanner can pick up all DTCs raised
1st OBD Scan: (Day 2)
PERMANENT (errors):
P0037 - H02S Heater Control Circuit Low
P0138 - O2 Sensor Circuit High Voltage
If those DTC's are correct then fault according to the internet is any one or more of these..Wiring, H02S heater, ECM, Fuel/Intake, Injector.
We know something about this O2 sensor game I think. If memory serves its the heating of same thats been a problem.
I'm using an OBDLink LX Bluetooth Scanner which may be able to monitor the O2 sensor function?
Repair Decision: (Day 3)
Considered booking into distant Nissan garage..No. Decided to use nearby ATS Euromaster as I know them. So next Tues its a diagnostic with a Bosch KTS200 Scanner of theirs. Hopefully it'll confirm my generic scanner detection as above. The DTC definitions shown above relate to an MR20DD 2L petrol engine which is not my 1.6 and hopefully (again) there has been an SAE standard applied....
Interesting that its a Bosch Scanner because I expect most of the vehicle electronics (ECU etc) is from Bosch...Nissan don't design/produce that stuff.
Repair Decision: (Day 4)
Bosch OBD Tester above at Euromaster confirmed my findings with a generic scanner. Fault is on Heated O2 Sensor that is installed after the Cat Converter. Being identified as Bank 1, Sensor 2. Have not tested the sensor but suspect the heater element has failed. That prevents the sensor working at the correct temperature..approx 300 deg C.
Now considering whether to replace it myself or goto Nissan. Am unsure of the re installation setup procedure which relates to the ECU learning the performance characteristics of a new HO2 sensor (H = Heated).
The procedure relates to running the engine from normal running temperature..approx 3k revs for 2 minutes. I had done similar on a BMW some years ago...successfully.