# P0456 on the 2012 Jeep Wrangler

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 P0456

- [10236933](https://open.wenmarpro.com/bulletins/10236933), 2023-05-30: wiTECH Small Leak Verification Test \(SLVT\) \- P0456\-EVAP SYSTEM SMALL LEAK
- [10220422](https://open.wenmarpro.com/bulletins/10220422), 2022-09-26: Flash: MIL Illumination P0830\- Clutch Upstop Switch Rationality or P0456\- Evap System Small Leak This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Codes have been set: P0830\- Clutch Upstop Switch Rationality P0456 \- Evap System Small LeakThe correction for Diagnostic Trouble Code P0456 only applies to 2013 Model Year vehicles.
- [10189190](https://open.wenmarpro.com/bulletins/10189190), 2021-03-22: Flash: MIL Illumination P0830\- Clutch Upstop Switch Rationality or P0456\- Evap System Small Leak This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Codes have been set: P0830\- Clutch Upstop Switch Rationality P0456 \- Evap System Small LeakThe correction for Diagnostic Trouble Code P0456 only applies to 2013 Model Year vehicles.
- [10136899](https://open.wenmarpro.com/bulletins/10136899), 2018-05-21: Flash: MIL Illumination P0830\- Clutch Upstop Switch Rationality or P0456\- Evap System Small Leak This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Codes have been set: P0830\- Clutch Upstop Switch Rationality P0456 \- Evap System Small LeakThe correction for Diagnostic Trouble Code P0456 only applies to 2013 Model Year vehicles.
- [10121700](https://open.wenmarpro.com/bulletins/10121700), 2017-11-03: Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with updated software. The customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Code \(DTCs\): · \*\*P0456 \- EVAP System Small Leak \(13 MY only\).\*\* · U0140 Lost Communication With Body Control Module. Attempting to clear the DTC may be unsuccessful. Other enhancements included in this update: · Improved fuel pump relay operation. · Improved remote start time after key activation. · Improved Automatic Shutdown Relay \(ASD\) timer calibration.