# P0456 on the 2019 Jeep Cherokee

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
- [10229791](https://open.wenmarpro.com/bulletins/10229791), 2023-01-17: Flash: Powertrain Control Module \(PCM\) Updates 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 that one or moreof the following DTCs have been set: P02EE \- Cylinder 1 Injector Circuit Performance. P02EF \- Cylinder 2 Injector Circuit Performance. P02F0 \- Cylinder 3 Injector Circuit Performance. P02F1 \- Cylinder 4 Injector Circuit Performance. P2C90 \- Crankcase Ventilation System \- Hose "A" Disconnected. P1D73 \- AGS performance fault. P04FC \- Crankcase Ventilation System Performance. P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation\(Enlarged Europe and Middle East/Africa\) only equipped with Gas ParticulateFilter \(GPF\)\)\(DTC will set when driving above 72 kph \(45 mph\). P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification test \(SLVT\) to determine if a leak is present in the system. P050B \- Cold Start Ignition Timing Performance. P258B \- Electric Vacuum Pump Performance. C1252\-92 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P2B95 \- Cold Start Injection Pulse Performance. P062A \- Fuel Pump Control Performance. P058C \- Battery Monitor Module Temperature Monitoring Performance. P0607 \- ECU Internal Performance. Injector performance faults for cylinders 2 \- 4 map to DTC for incorrect cylinders. In addition the following software enhancement are included: AGS stuck condition \(The customer won't see an issue, but this calibrationallows AGS performance fault \- P1D73, to work correctly\). Software corrects an issue with the wrong cylinder identification if an injectorcircuit performance fault is set in the PCM: If any of the series of injector control circuit faults are set, please refer tothe bullet\-pointed list below to determine which injector to address.
- [10229327](https://open.wenmarpro.com/bulletins/10229327), 2023-01-09: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the following DTCs have been set:P04FC \- Crankcase Ventilation System Performance. P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation\(EMEA only equipped with Gas Particulate Filter \(GPF\)\)\(DTC will set when driving above 72 kph \(45 mph\). P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification test \(SLVT\) to determine if a leak is present in the system. P050B \- Cold Start Ignition Timing Performance. P258B \- Electric Vacuum Pump Performance. C1252\-92 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P2B95 \- Cold Start Injection Pulse Performance. P062A \- Fuel Pump Control Performance. P058C \- Battery Monitor Module Temperature Monitoring Performance. P0607 \- ECU Internal Performance. Injector performance faults for cylinders 2 \- 4 map to DTC for incorrect cylinders. In addition the following software enhancement are included:Software corrects an issue with the wrong cylinder identification if an injector circuit performance fault is set in the PCM:If any of the series of injector control circuit faults are set, please refer to the bullet\-pointed list below to determine which injector to address.For reference, the correct injector circuit performance faults are listed below:P02EE \- Cylinder 1 Injector Circuit Performance. P02EF \- Cylinder 2 Injector Circuit Performance. P02F0 \- Cylinder 3 Injector Circuit Performance. P02F1 \- Cylinder 4 Injector Circuit Performance. Customers may also experience the following condition:Audible noise from the Low Temperature Radiator \(LTR\) coolant pump, at low speeds. Abnormal noise from the radiator cooling fan. LTR runs too long after the engine is turned off.
- [10228033](https://open.wenmarpro.com/bulletins/10228033), 2022-12-19: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following DTCs: P1D83 \- Implausible Engine Oil Temperature Signal Received. P2610 \- PCM Internal Engine Off Timer Performance. P06EF \- Engine Restart Performance. P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test \(SLVT\) to determine if a leak is present in the system. C1252 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P06DA \- Engine Oil Pressure Control Circuit. P06DD \- Engine Oil Pressure Control Circuit Stuck Off. P06DE \- Engine Oil Pressure Control Circuit Stuck On. B25C7 \- Driver Door Ajar Switch 2 Circuit Low. B25C8 \- Driver Door Ajar Switch 2 Circuit High. B25C9 \- Driver Door Ajar Switch 2 Stuck Closed. B25CB \- Driver Door Ajar Switch 1/Driver Door Ajar Switch 2 Correlation. C10D0 \- Electronic Park Brake Module Deactivated. P0EA5 \- DC/DC Converter 2 Performance. P0EA6 \- DC/DC Converter 2 Over Temperature. P2299 \- Brake Pedal Position/Accelerator Pedal Position Incompatible. U0128 \- Lost Communication With Park Brake Control Module. U0151 \- Lost Communication With Occupant Restraint Controller. U0416 \- Implausible Data Received From Esp. U0418 \- Implausible Data Received From Brake System Control Module 1. U0599 \- Invalid Data Received From DC to DC Converter Control Module "A". U0299 \- LOC With DC\-DC Convertor 2. U1409 \- Implausible LF WSS Received. U140A \- Implausible RF WSS Received. U059A \- Invalid Data Received From DC to DC Converter Control Module "B". C0542 \- Brake Pressure Sensor 2 Circuit Low. C0543 \- Brake Pressure Sensor 2 Circuit High. P258A \- Electric Vacuum Pump Circuit P0616 \- Starter Control Circuit Lo. \- Starter Control Circuit High. P0607 \- ECU Internal Performance
- [10223954](https://open.wenmarpro.com/bulletins/10223954), 2022-10-17: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following DTCs:P2610 \- PCM Internal Engine Off Timer Performance. P06EF \- Engine Restart Performance. P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test \(SLVT\) to determine if a leak is present in the system. C1252 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P06DA \- Engine Oil Pressure Control Circuit. P06DD \- Engine Oil Pressure Control Circuit Stuck Off. P06DE \- Engine Oil Pressure Control Circuit Stuck On. B25C7 \- Driver Door Ajar Switch 2 Circuit Low. B25C8 \- Driver Door Ajar Switch 2 Circuit High. B25C9 \- Driver Door Ajar Switch 2 Stuck Closed. B25CB \- Driver Door Ajar Switch 1/Driver Door Ajar Switch 2 Correlation. C10D0 \- Electronic Park Brake Module Deactivated. P0EA5 \- DC/DC Converter 2 Performance. P0EA6 \- DC/DC Converter 2 Over Temperature. P2299 \- Brake Pedal Position/Accelerator Pedal Position Incompatible. U0128 \- Lost Communication With Park Brake Control Module. U0151 \- Lost Communication With Occupant Restraint Controller. U0416 \- Implausible Data Received From Esp. U0418 \- Implausible Data Received From Brake System Control Module 1. U0599 \- Invalid Data Received From DC to DC Converter Control Module "A". U0299 \- LOC With DC\-DC Convertor 2. U1409 \- Implausible LF WSS Received. U140A \- Implausible RF WSS Received. U059A \- Invalid Data Received From DC to DC Converter Control Module "B". C0542 \- Brake Pressure Sensor 2 Circuit Low. C0543 \- Brake Pressure Sensor 2 Circuit High. P258A \- Electric Vacuum Pump Circuit \(turn MIL off, switch to 1 trip fault\). P0616 \- Starter Control Circuit Low. P0617 \- Starter Control Circuit High. P0607 \- ECU Internal Performance. P3032 \- Barometric Pressure Sensor Performance
- [10221757](https://open.wenmarpro.com/bulletins/10221757), 2022-09-26: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the following DTCs have been set:P04FC \- Crankcase Ventilation System Performance. P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation\(EMEA only equipped with Gas Particulate Filter \(GPF\)\)\(DTC will set when driving above 72 kph \(45 mph\). P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification test \(SLVT\) to determine if a leak is present in the system. P050B \- Cold Start Ignition Timing Performance. P258B \- Electric Vacuum Pump Performance. C1252\-92 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P2B95 \- Cold Start Injection Pulse Performance. P062A \- Fuel Pump Control Performance. P058C \- Battery Monitor Module Temperature Monitoring Performance. P0607 \- ECU Internal Performance. Injector performance faults for cylinders 2 \- 4 map to DTC for incorrect cylinders. In addition the following software enhancement are included:Software corrects an issue with the wrong cylinder identification if an injector circuit performance fault is set in the PCM:If any of the series of injector control circuit faults are set, please refer to the bullet\-pointed list below to determine which injector to address.For reference, the correct injector circuit performance faults are listed below:P02EE \- Cylinder 1 Injector Circuit Performance. P02EF \- Cylinder 2 Injector Circuit Performance. P02F0 \- Cylinder 3 Injector Circuit Performance. P02F1 \- Cylinder 4 Injector Circuit Performance. Customers may also experience the following condition:Audible noise from the Low Temperature Radiator \(LTR\) coolant pump, at low speeds. Abnormal noise from the radiator cooling fan. LTR runs too long after the engine is turned off.
- [10220613](https://open.wenmarpro.com/bulletins/10220613), 2022-09-26: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available 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 \(DTCs\):P2610 \- PCM Internal Engine Off Timer Performance. P06EF \- Engine Restart Performance. P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test \(SLVT\) to determine if a leak is present in the system. C1252 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P06DA \- Engine Oil Pressure Control Circuit. P06DD \- Engine Oil Pressure Control Circuit Stuck Off. P06DE \- Engine Oil Pressure Control Circuit Stuck On. B25C7 \- Driver Door Ajar Switch 2 Circuit Low. B25C8 \- Driver Door Ajar Switch 2 Circuit High. B25C9 \- Driver Door Ajar Switch 2 Stuck Closed. B25CB \- Driver Door Ajar Switch 1/Driver Door Ajar Switch 2 Correlation. C10D0 \- Electronic Park Brake Module Deactivated. P0EA5 \- DC/DC Converter 2 Performance. P0EA6 \- DC/DC Converter 2 Over Temperature. P2299 \- Brake Pedal Position/Accelerator Pedal Position Incompatible. U0128 \- Lost Communication With Park Brake Control Module. U0151 \- Lost Communication With Occupant Restraint Controller. U0416 \- Implausible Data Received From Esp. U0418 \- Implausible Data Received From Brake System Control Module 1. U0599 \- Invalid Data Received From DC to DC Converter Control Module "A". U0299 \- LOC With DC\-DC Convertor 2. U1409 \- Implausible LF WSS Received. U140A \- Implausible RF WSS Received. U059A \- Invalid Data Received From DC to DC Converter Control Module "B". C0542 \- Brake Pressure Sensor 2 Circuit Low. C0543 \- Brake Pressure Sensor 2 Circuit High. P258A \- Electric Vacuum Pump Circuit \(turn MIL off, switch to 1 trip fault\). P0616 \- Starter Control Circuit Low. P0617 \- Starter Control Circuit High.P0607 \- ECU Internal Performance.
- [10220074](https://open.wenmarpro.com/bulletins/10220074), 2022-09-15: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following DTCs:P06EF \- Engine Restart Performance. P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification test \(SLVT\) to determine if a leak is present in the system. C1252 \- Vacuum Pump Control Circuit \- Performance Or Incorrect Operation. P06DA \- Engine Oil Pressure Control Circuit. P06DD \- Engine Oil Pressure Control Circuit Stuck Off. P06DE \- Engine Oil Pressure Control Circuit Stuck On. B25C7 \- Driver Door Ajar Switch 2 Circuit Low. B25C8 \- Driver Door Ajar Switch 2 Circuit High. B25C9 \- Driver Door Ajar Switch 2 Stuck Closed. B25CB \- Driver Door Ajar Switch 1/Driver Door Ajar Switch 2 Correlation. C10D0 \- Electronic Park Brake Module Deactivated. P0EA5 \- DC/DC Converter 2 Performance. P0EA6 \- DC/DC Converter 2 Over Temperature. P2299 \- Brake Pedal Position/Accelerator Pedal Position Incompatible. U0128 \- Lost Communication With Park Brake Control Module. U0151 \- Lost Communication With Occupant Restraint Controller. U0416 \- Implausible Data Received From Esp. U0418 \- Implausible Data Received From Brake System Control Module 1. U0599 \- Invalid Data Received From DC to DC Converter Control Module "A". U0299 \- LOC With DC\-DC Convertor 2. U1409 \- Implausible LF WSS Received. U140A \- Implausible RF WSS Received. U059A \- Invalid Data Received From DC to DC Converter Control Module "B". C0542 \- Brake Pressure Sensor 2 Circuit Low. C0543 \- Brake Pressure Sensor 2 Circuit High. P258A \- Electric Vacuum Pump Circuit \(turn MIL off, switch to 1 trip fault\). P0616 \- Starter Control Circuit Low. P0617 \- Starter Control Circuit High. P0607 \- ECU Internal Performance. P3032 \- Barometric Pressure Sensor Performance Plausibility.
- [10220073](https://open.wenmarpro.com/bulletins/10220073), 2022-09-15: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set:P06EF \- Engine Restart Performance. P0456 \- EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification test \(SLVT\) to determine if a leak is present in the system. Customers may also comment on one or more of the following:Extended engine crank times or possibly a no start condition\(South Korea with Sales Code EDD only\). The engine fails to restart while in Engine Stop/Start \(ESS\) mode. This is usually accompanied withDTC P06EF.
- [10220071](https://open.wenmarpro.com/bulletins/10220071), 2022-09-15: wiTECH Small Leak Verification Test \(SLVT\) \- P0456\-EVAP SYSTEM SMALL LEAK