well that thing is dumb i guess b/c the Bentley says:
P1128 - Long Term Fuel Trim mult., Bank1 (System is running too lean)
- Check oxygen sensor and oxygen sensor control before and after catalyst
- Check fuel pressure regulator and residual pressure
- Check Mass Air Flow (MAF) sensor
- Check intake system and vacuum lines for leaks
- Check fuel injectors and EVAP canister purge regulator valve
- Check air intake screen (if equipped) and air filter for blockage
- Check fuel pump.
- Check exhaust system for leaks.
- Check Secondary Air Injection (AIR) system for leaks.
Good luck to ya man