palmerj
04-06-2017, 10:55 PM
Hopefully my experiences with my lambda sensor will help someone else out there.
At 71755 miles my A4 Avant S-Line 2.0 TDI 177PS came up with the following error code after putting up the engine warning light on.
01: Engine (J623-CGLC)
1 Fault Found:
5120 - Oxygen (Lambda) Sensor B1 S1
P2196 00 [237] - Signal too High (Rich)
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 7
Mileage: 115140 km
Date: 2017.03.16
Time: 15:10:41
Engine speed: 1517.50 /min
Normed load value: 0.0 %
Vehicle speed: 84 km/h
Coolant temperature: 90 °C
Intake air temperature: 13 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 14.820 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 574.9 mg/stroke
Mean injection quantity: 0.00 mg/stroke
O2 sensor 1 bank 1: adjusted oxygen value: 0.06112
O2 sensor 1: bank 1: voltage raw value O2 signal: 843.4 mV
O2 sensor 1 bank 1: voltage reading Ri-signal: filtered.: 1001.6 mV
O2 sensor 1 bank 1: duty cycle O2 heater: 45.74 %
Particle filter: difference pressure: 29 hPa
As I have Ross-Tech cable I cleared the fault and waited while investigating on the internet.
Apparently there are several things that can give this error as well as a faulty sensor, mostly air leaks making the system think it's running rich.
The main thing I was watching the MPG which stayed the same throughout the time before I changed it. As the MPG was steady as a rock it pointed to the sensor being faulty and not over fueling.
The problem returned after about every 200 miles several times, each time I cleared it and carried on monitoring.
A genuine Audi replacement is £178, wow. I opted for a Bosch one at £68 and £14 for a Lambda socket from Halfords.
Within 30 mins of starting I had a new sensor fitted and working. The only thing that I can see between the Audi and Bosch sensors is the Bosch has a longer lead on it. So basically you pay an extra £110 for a shorter cable that fits exactly, instead of having to cable tie it up out of the way.
I hope this helps someone
Happy driving
At 71755 miles my A4 Avant S-Line 2.0 TDI 177PS came up with the following error code after putting up the engine warning light on.
01: Engine (J623-CGLC)
1 Fault Found:
5120 - Oxygen (Lambda) Sensor B1 S1
P2196 00 [237] - Signal too High (Rich)
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 7
Mileage: 115140 km
Date: 2017.03.16
Time: 15:10:41
Engine speed: 1517.50 /min
Normed load value: 0.0 %
Vehicle speed: 84 km/h
Coolant temperature: 90 °C
Intake air temperature: 13 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 14.820 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 574.9 mg/stroke
Mean injection quantity: 0.00 mg/stroke
O2 sensor 1 bank 1: adjusted oxygen value: 0.06112
O2 sensor 1: bank 1: voltage raw value O2 signal: 843.4 mV
O2 sensor 1 bank 1: voltage reading Ri-signal: filtered.: 1001.6 mV
O2 sensor 1 bank 1: duty cycle O2 heater: 45.74 %
Particle filter: difference pressure: 29 hPa
As I have Ross-Tech cable I cleared the fault and waited while investigating on the internet.
Apparently there are several things that can give this error as well as a faulty sensor, mostly air leaks making the system think it's running rich.
The main thing I was watching the MPG which stayed the same throughout the time before I changed it. As the MPG was steady as a rock it pointed to the sensor being faulty and not over fueling.
The problem returned after about every 200 miles several times, each time I cleared it and carried on monitoring.
A genuine Audi replacement is £178, wow. I opted for a Bosch one at £68 and £14 for a Lambda socket from Halfords.
Within 30 mins of starting I had a new sensor fitted and working. The only thing that I can see between the Audi and Bosch sensors is the Bosch has a longer lead on it. So basically you pay an extra £110 for a shorter cable that fits exactly, instead of having to cable tie it up out of the way.
I hope this helps someone
Happy driving