Hello. I have Punto 1.2 8v MK2b with LPG device. The check engine light came on, so i put a code reader on my punto and its showing the trouble codes: p0170, p0500 and U1602. Any idea anyone ?

https://www.fiatforum.com/tech-talk/197403-eobd-error-code-list.html
https://www.fiatforum.com/punto/128395-fault-codes.html

• P0170 Fuel Trim Malfunction (Bank 1)
• P0500 Vehicle Speed Sensor Malfunction
• U1602 - CAN Data Bus - communication error probable cause:-
  • Wiring, poor connection.

Sounds like Lamda sensor from a quick search.

Thanks mate, I'll try to clean the lamda sensor first...