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Service bulletins for the 2012 Jeep Wrangler

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

244 on file from NHTSA, as of 2026-10-19.

About P0456 on the 2012 Jeep Wrangler: what the code means, and the bulletins and recalls about the same components.

By type

By component

By trouble code

Only bulletins with trouble code: P0456 are shown. Show all

Bulletins, newest first
18048232023-05-30. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK
18024132022-09-26. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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.
18-024-132021-03-22. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. 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.
18-024-132018-05-21. Service bulletin. ELECTRICAL SYSTEM. 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.
18-025-16 REV. A2017-11-03. Service bulletin. FUEL SYSTEM, GASOLINE; POWER TRAIN; ELECTRICAL SYSTEM. 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.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.