Technical Fiat grande Punto 1.4 95hp lamda sensor faults

[RCR]

I got these problems for a while and don’t know how to fix them, did go to the junkyard and bought 3 lamda sensors non of them fixed the problem even placed a a lamda faker on the second bank so it shouldn’t give any faults on bank 2 then but still did


What’s wrong with bank 1 sensor 1 I’m clueless the car drives on lpg and there are some wires connected to the lamda sensor but even if I place a second hand lamda sensor without connecting the lpg cables to the lamda it still gives me those errors

 

[GrandePunto PL]

1. Can you use the multimeter properly and check the heaters in the lambdas? And the wiring. Very first, obvious thing (common sense) to do, without internet.
2. Your LPG may interrupt the oxygen sensors wiring (some use that signals to adjust the LPG injection time, some don't - same for CAN lines, some LPGs interfere with it, and some people cannot connect the OBD2 to the ECU, unless you take out the LPG main fuse, but I digress).
3. Take an exhaust test (gas analyzer, ask for print, results), to check if the catalytic converter is still alive. Test on gasoline/petrol (LPG disabled).
4. As for OBD, use Fiat specific software (FES, MES, AlfaOBD), not some free, universal (and useless) code readers/erasers.

 

[RCR]

1. Can you use the multimeter properly and check the heaters in the lambdas? And the wiring. Very first, obvious thing (common sense) to do, without internet.
2. Your LPG may interrupt the oxygen sensors wiring (some use that signals to adjust the LPG injection time, some don't - same for CAN lines, some LPGs interfere with it, and some people cannot connect the OBD2 to the ECU, unless you take out the LPG main fuse, but I digress).
3. Take an exhaust test (gas analyzer, ask for print, results), to check if the catalytic converter is still alive. Test on gasoline/petrol (LPG disabled).
4. As for OBD, use Fiat specific software (FES, MES, AlfaOBD), not some free, universal (and useless) code readers/erasers.

Thank you for your reply, I have multi Ecu and it shows the same fault codes, and I did go to the garage and the gasses where way to much on gasoline and lpg. But that can also be cause duo the lamda sensor not working