P0456 on the 2016 Chrysler 300
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.
| 1804823 | 2023-05-30. Service bulletin. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK |
|---|---|
| 1807517 | 2022-10-24. Service bulletin. Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following DTCs: P000B - Bank 1 Camshaft 2 Position Slow Response. P0016 - Crankshaft/Camshaft Timing Misalignment - Bank 1 Sensor 1. P0335 - Crankshaft Position Sensor Circuit. P0339 - Crankshaft Position Sensor Intermittent. P0441 - EVAP Purge System Performance. P0455 - EVAP System Large Leak. P2610 - PCM Internal Engine Off Timer Performance. P0456 - EVAP System Small Leak. P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. Customers may also notice the following condition(s): Brief engine idle fluctuation while in hot ambient temperatures. A slight hesitation during light pedal application after engine cold start. Driveline noises. Engine stumble/hesitation on a very hard pedal acceleration from a dead stop. Transmission enhancements during low-speed braking turning maneuvers. False detonation (spark knock) detected during a wide-open throttle (LA Challenger Sales Codes ESH with DEC only). In addition, the following software enhancements are available: Reduce bumps felt on light to medium decal braking and coming to a stop. Launch spark improvement change from 35 MPH to 10 MPH. Reverse lock out speed change from 10 MPH to 3 MPH (Sales Code DEC only). Torque security calibration changes to desensitize brake throttle override entry conditions. Calibration changes to address engine speed undershoot/overshoot during clutch disengagement when coming to a stop (Sales Code DEC only). Start fuel and transient fuel calibration change for improved drivability robustness. Purge calibration changes for a more robust purge volume result at altitude. Individual Cylinder Fuel Control (ICFC) calibration changes for improved fueling offset accuracy. |
| 1807617 | 2022-10-24. Service bulletin. Flash: Powertrain Diagnostic and System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DiagnosticTrouble Codes (DTCs) have been set:P2066 - Fuel Level Sensor 2 Performance (Sales Codes ERB with AHB or AHV only). P0335 - Crankshaft Position Sensor Circuit. P0456 - EVAP System Small Leak. P2610 - PCM Internal Engine Off Timer Performance. In addition to the above DTCs, this software release also includes:Enhancements to the disable misfire monitor when P0335 is present. Add a global disable to small leak monitor when the fuel level is above88%. Update small leak diagnostic to require five minutes of engine run-time and120 minutes of engine off-time. Updates to prevent false failure due to wrong ambient temperature reading. |
| 1807020 | 2022-09-26. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with updated software. 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) set in memory:P0456 - EVAP System Small Leak. P0335 - Crankshaft Position Sensor Circuit. P2610 - PCM Internal Engine Off Timer Performance. In addition, customers with an (LD) pursuit vehicle may experience the following condition:An unpleasant odor in the vehicle under certain extreme ambient conditions(Sales Codes EZH with AHB or AHV only). |
| 1808919 | 2022-09-15. Service bulletin. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK |
| 18-073-16 | 2022-08-22. Service bulletin. Flash: 3.6L Powertrain Diagnostic And System Enhancements. This bulletin involves reprogramming the Powertrain Control Module (PCM) 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 the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · P0335 - Crankshaft Position Sensor Circuit. · P0456 - EVAP System Small Leak. · P2610 - PCM Internal Engine Off Timer Performance. In addition to the above DTCs, this software release also includes: · Enhancements to the disable misfire monitor when P0335 is present. · Add a global disable to small leak monitor when the fuel level is above 88%. · Update small leak diagnostic to require 5 minutes of engine runtime and 120 minutes of engine off time. · Updates to prevent false failure due to wrong ambient temperature reading. |
| 18-074-16 | 2022-08-22. Service bulletin. Flash: Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · P0456 - EVAP System Small Leak. · P0335 - Crankshaft Position Sensor Circuit. · P2610 - PCM Internal Engine Off Timer Performance. |
| 18-070-20 | 2020-09-28. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with updated software. 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) set in memory:P0456 - EVAP System Small Leak. P0335 - Crankshaft Position Sensor Circuit. P2610 - PCM Internal Engine Off Timer Performance. In addition, customers with an (LD) pursuit vehicle may experience the following condition:An unpleasant odor in the vehicle under certain extreme ambient conditions(Sales Codes EZH with AHB or AHV only). |
| 18-089-19 | 2019-12-16. Service bulletin. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK |
| 18-020-16 | 2018-06-18. Service bulletin. Flash: 6.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience one or more of the following symptoms and/or a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): · P0456 - EVAP System Small Leak. · P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. Customers may also notice the following condition(s): · Brief engine idle fluctuation while in hot ambient temperatures. · A slight hesitation during light pedal application after engine cold start. · Driveline noises. · Engine stumble/hesitation on a very hard pedal acceleration from a dead stop. · Transmission enhancements during low speed braking turning maneuvers. · False detonation (spark knock) detected during a wide open throttle (LA) Challenger (Sales Codes ESH with DEC only). In addition, the following software enhancement is available: · Calibration Improvements for non-adaptive cruise control equipped vehicles. |
14 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.