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Service bulletins for the 2016 Ram 2500

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.

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

About P0456 on the 2016 Ram 2500: what the code means, and the bulletins and recalls about the same components.

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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
1810822REVA2022-09-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with updatedsoftware. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find oneor more of the following Diagnostic Trouble Codes (DTCs): P0335 - Crankshaft Position Sensor Circuit. P2610 - PCM Internal Engine Off Timer Performance. P0456 - EVAP System Small Leak.
18108222022-09-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with updatedsoftware. The customer may describe extended cranking or starting times when the Compressed Natural Gas (CNG) tank level is low(DJ only) (Sales Code EZF only).Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation thetechnician may find one or more of the following Diagnostic Trouble Codes (DTCs): P0335 - Crankshaft Position Sensor Circuit. P2610 - PCM Internal Engine Off Timer Performance. P0456 - EVAP System Small Leak.
18089192022-09-15. Service bulletin. ENGINE AND ENGINE COOLING. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK
18-089-192019-12-16. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK
18-109-152019-05-20. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: 5.7L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software. A small number of customers may experience one or more of the symptoms/conditions listed below or a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Codes (DTCs) have been set. If any of the following DTCs have been set, perform the Diagnosis. ? P0456 Evap System Small Leak. ? P2610 - PCM Internal Engine Off Timer Performance.
18-080-15 REV A2019-05-20. Service bulletin. POWER TRAIN. Flash: 6.4L Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. NOTE: This bulletin fixes all vehicles listed and also contains an optional software path for situations where the customer is specifically complaining of a Drone Noise, Shudder, Pulsation, or Vibration under light throttle applications while vehicle is operating in MDS/ECO mode (optional software available for D2 & DJ vehicles). There will be two separate software options displayed on the wiTECH flash tab. The software file released for this condition contains the verbiage OPTIONAL. The other file is the standard software that does not contain improvements for the Drone/Shudder concern. If for some reason the customer finds this shudder improvement objectionable, the PCM software may be returned/reflashed to the standard version. Both software versions will address the remaining conditions noted in the bulletin. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC): ? P0456 - Evap System Small Leak. ? P3402 - Cylinder 1 Deactivation Control Performance. ? P3426 - Cylinder 4 Deactivation Control Performance. ? P3442 - Cylinder 6 Deactivation Control Performance. ? P3450 - Cylinder 7 Deactivation Control Performance. ? P2610 - PCM Internal Engine Off Timer Performance set in the PCM memory. In addition to the DTC listed above, the software update will improve: Improved Cruise Control Acceleration mode. ? Improved Multi Displacement System operation. 6-Speed Automatic 66RFE transmission (Sales Code DFP). ? Multi Displacement System function improved while in PTO stationary mode. 6-Speed Auto Aisin AS66RC transmission (Sales Code DF3). ? Potential small improvement in fuel economy at higher altitudes. ? Potential improvement in high altitude eng
18-081-162017-11-03. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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 that the following DTCs have been set: · **P0335 - Crankshaft Position Sensor Circuit. · P2610 - PCM Internal Engine Off Timer Performance.** · P0456 - EVAP System Small Leak.
18-082-162017-11-03. Service bulletin. SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM; POWER TRAIN. Flash: 6.4L 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 DTCs: · **P0335 - Crankshaft Position Sensor Circuit. · P2610 - PCM Internal Engine Off Timer Performance.** · P0456 - EVAP System Small Leak. · P3402 - Cylinder 1 Deactivation Control Performance. · P3426 - Cylinder 4 Deactivation Control Performance. · P3442 - Cylinder 6 Deactivation Control Performance. · P3450 - Cylinder 7 Deactivation Control Performance. · P2610 - PCM Internal Engine Off Timer Performance set in the PCM memory. In addition to the DTCs listed above, the software update will improve: · **Correct an issue related to rounding of the cruise control set speed displayed in the cluster. · Brake Throttle Override calibration has changed to be less sensitive. · Throttle Body supplier change has caused a widening of the minimum and maximum voltage limits · Correct a software issue with oil pressure light function at key-up. · Correct a software issue related to idle timer. · Correct a software issue with inconsistent engine RPM increments/decrements with operator idle speed.(DD/DF/DP ONLY).** · Improved Cruise Control Acceleration mode. · Improved Multi Displacement System operation 6-Speed Automatic 66RFE transmission (Sales Code DFP). · Multi Displacement System function improved while in PTO stationary mode. 6-Speed Auto Aisin AS66RC transmission (Sales Code DF3). · Potential small improvement in fuel economy at higher altitudes. · Potential improvement in high altitude engine idle RPM stability. · EGR monitor status function.

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