Good morning,
The 1128,1129 codes are for fuel mapping from the PCM. It is not seeing the correct information to control the fuel mapping from the O2 sensors. You may need O2 sensors, but needs to be confirmed. I posted a list of possibilities below that need to be checked by someone with a scan tool.
The 171,174 are for lean condition. It could be from a vacuum leak, low fuel pressure, PCV valve or a mass air flow sensor. Again, all these items need to be checked for the failure. I posted the possibilities below for this as well.
Roy
1128,1129
P1128
Descriptor
Closed Loop Fueling Not Achieved - Bank 1
Probable Causes
Engine Coolant Temperature (ECT) Sensor, Wiring or Connectors
Engine Mechanical System
Fuel Delivery System
Manifold Absolute Pressure (MAP) Sensor, Wiring, or Connectors
Oxygen Sensor (O2S), Wiring, or Connectors
Power-train Control Module (PCM)
171,174
P0171
Descriptor
Fuel System 1/1 Lean
Probable Causes
Engine Coolant Temperature (ECT) Sensor, Wiring or Connectors
Engine Mechanical System
Fuel Delivery System
Manifold Absolute Pressure (MAP) Sensor, Wiring, or Connectors
Oxygen Sensor (O2S), Wiring, or Connectors
Power-train Control Module (PCM)
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Saturday, November 24th, 2018 AT 6:24 AM