# P0171 on the 2016 Fiat 500

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0171

- [10150531](https://open.wenmarpro.com/bulletins/10150531), 2018-12-10: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Engine Control Module \(ECM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? P0171 \- Fuel System 1/1 Lean ? P050D \- Cold Start Rough Idle
- [10149669](https://open.wenmarpro.com/bulletins/10149669), 2018-12-03: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Engine Control Module \(ECM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? U0402 \- implausible data received from TCM ? P0133 \- O2 sensor 1/1 slow response ? P0171 \- Fuel System 1/1 Lean ? P050D \- Cold Start Rough Idle In addition, customers may experience one or more of the following concerns: ? RPM flare at cold start. ? Less than desired idle performance. ? Cold engine RPM surge with gear engagement.
- [10148678](https://open.wenmarpro.com/bulletins/10148678), 2018-11-19: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Engine Control Module \(ECM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? U0402 \- Implausible Data Received From TCM. ? P0133 \- O2 Sensor 1/1 Slow Response. ? P0171 \- Fuel System 1/1 Lean. ? P050D \- Cold Start Rough Idle. In addition, customers may experience one or more of the following concerns: ? Clatter or ticking noise from the engine at idle. ? RPM flare at cold start. ? Less than desired idle performance. ? Cold engine RPM surge with gear engagement.