I'm hoping a fellow FSi owner can help.
I've recently had a new Pre-cat Lambda sensor fitted - Bosch direct fit equivalent for P/N 047906262
Unfortunately I continue to have poor running, fluctuating idle, loss of power when cruising / accellerating intermittently.
Using VCDS
Group 032 Fuel Trims display 0 and 0 which doesn't seem right - this is after 200miles of runnign and surely there should be some fuel trim.
Group 031 1st Lambda value sits around 0.977 and 2nd Lambda value stays permanently at 1.0
Group 030 gives Lambda status values as 00111 for Bank1 S1 and 0100 for 2nd block ?Bank1 S2 -- please could someone read this block on their FSi and let me know what it gives
VCDS Scan shows the following codes:
16523 - Oxygen (Lambda) Sensor B1 S2: Response too Slow
P0139 - 35-00 - -
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-00 - -
17441 - Sensor for NOx (G295): Signal too Low
P1033 - 35-10 - - - Intermittent
These all recur after about 200miles when cleared.
All of these could be caused by an exhaust leak - althouhg nothing obvious and I've checked the EGR connecting pipe again (previously replaced) -unlit blowtorch doesn't affect revs
I'm trying to work out if the new Lambda sensor is in some way defective.
I've never replaced the Nox Sensor, and dont' know if a faulty Nox would cause the B1S2 error (as I can't work out which other sensor would correspond with B1 S2 . I dont' want to shell out £199 for a new NoX sensor if not needed.
I can clean connectors and refit to ensure not a poor connection.
Any other ideas welcome- I would appreciate readings for blocks 030 and 031 from a fellow owner to compare.
Thanks for all your help which over the years has been invaluable.
I've recently had a new Pre-cat Lambda sensor fitted - Bosch direct fit equivalent for P/N 047906262
Unfortunately I continue to have poor running, fluctuating idle, loss of power when cruising / accellerating intermittently.
Using VCDS
Group 032 Fuel Trims display 0 and 0 which doesn't seem right - this is after 200miles of runnign and surely there should be some fuel trim.
Group 031 1st Lambda value sits around 0.977 and 2nd Lambda value stays permanently at 1.0
Group 030 gives Lambda status values as 00111 for Bank1 S1 and 0100 for 2nd block ?Bank1 S2 -- please could someone read this block on their FSi and let me know what it gives
VCDS Scan shows the following codes:
16523 - Oxygen (Lambda) Sensor B1 S2: Response too Slow
P0139 - 35-00 - -
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-00 - -
17441 - Sensor for NOx (G295): Signal too Low
P1033 - 35-10 - - - Intermittent
These all recur after about 200miles when cleared.
All of these could be caused by an exhaust leak - althouhg nothing obvious and I've checked the EGR connecting pipe again (previously replaced) -unlit blowtorch doesn't affect revs
I'm trying to work out if the new Lambda sensor is in some way defective.
I've never replaced the Nox Sensor, and dont' know if a faulty Nox would cause the B1S2 error (as I can't work out which other sensor would correspond with B1 S2 . I dont' want to shell out £199 for a new NoX sensor if not needed.
I can clean connectors and refit to ensure not a poor connection.
Any other ideas welcome- I would appreciate readings for blocks 030 and 031 from a fellow owner to compare.
Thanks for all your help which over the years has been invaluable.