Hi all,
I’ve recently (for the last month or two) had a problem with an MCSF failure on my car.
I’ve checked, and the error given is always P0150 – Lambda Signal 2 above Cat No Signal.
Using FiatECUScan (very good!) I’ve graphed the response of all 3 Lambda Sensors also showing Engine RPM (see below). All readings were taken with the engine at operating temp (88-90C)
As you can see, the Bank1 Pre-Cat Sensor seems to be responding normally. However the Bank2 Pre-Cat Sensor is at a constant 0.465V.
My immediate thought was “Ah, it’s a dodgy sensor, I’ll replace it”. However I did, and no difference.
So I thought “What if I swap the sensors around to see if the problem replicates?”
I did this, and get the same basic output. This indicates to me that both pre-cat Sensors are working fine.
I also checked the wiring continuity from sensor to ECU, and this appears to be fine.
Anybody got any thoughts?
To clarify, the replacement sensor is NOT an OEM sensor. However it doesn’t throw up any faults when connected on the other bank, so I don’t think it’s an incorrect resistance problem.
Also the car is a ‘01 147 1.6TS.
Thanks for any help, this is really bugging me.
I’ve recently (for the last month or two) had a problem with an MCSF failure on my car.
I’ve checked, and the error given is always P0150 – Lambda Signal 2 above Cat No Signal.
Using FiatECUScan (very good!) I’ve graphed the response of all 3 Lambda Sensors also showing Engine RPM (see below). All readings were taken with the engine at operating temp (88-90C)
As you can see, the Bank1 Pre-Cat Sensor seems to be responding normally. However the Bank2 Pre-Cat Sensor is at a constant 0.465V.
My immediate thought was “Ah, it’s a dodgy sensor, I’ll replace it”. However I did, and no difference.
So I thought “What if I swap the sensors around to see if the problem replicates?”
I did this, and get the same basic output. This indicates to me that both pre-cat Sensors are working fine.
I also checked the wiring continuity from sensor to ECU, and this appears to be fine.
Anybody got any thoughts?
To clarify, the replacement sensor is NOT an OEM sensor. However it doesn’t throw up any faults when connected on the other bank, so I don’t think it’s an incorrect resistance problem.
Also the car is a ‘01 147 1.6TS.
Thanks for any help, this is really bugging me.