# 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.

## 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
- [10224756](https://open.wenmarpro.com/bulletins/10224756), 2022-10-24: 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.
- [10224750](https://open.wenmarpro.com/bulletins/10224750), 2022-10-24: 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.
- [10221890](https://open.wenmarpro.com/bulletins/10221890), 2022-09-26: 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\(Sales Codes EZH with AHB or AHV only\).
- [10220071](https://open.wenmarpro.com/bulletins/10220071), 2022-09-15: wiTECH Small Leak Verification Test \(SLVT\) \- P0456\-EVAP SYSTEM SMALL LEAK
- [10218280](https://open.wenmarpro.com/bulletins/10218280), 2022-08-22: 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.
- [10218279](https://open.wenmarpro.com/bulletins/10218279), 2022-08-22: 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.
- [10180280](https://open.wenmarpro.com/bulletins/10180280), 2020-09-28: 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\(Sales Codes EZH with AHB or AHV only\).
- [10169219](https://open.wenmarpro.com/bulletins/10169219), 2019-12-16: wiTECH Small Leak Verification Test \(SLVT\) \- P0456\-EVAP SYSTEM SMALL LEAK
- [10141318](https://open.wenmarpro.com/bulletins/10141318), 2018-06-18: 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.