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Service bulletins for the 2020 Ram 1500

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.

1228 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

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Only bulletins with component: Parking brake are shown. Show all

Bulletins, newest first
18-002-232023-02-13. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC; PARKING BRAKE. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: **P2183 - Engine Coolant Temperature Sensor 2 Circuit Performance. P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. P025C - Fuel Pump Module Control Circuit Low. P208B - Reductant Pump 1 Control Performance. P0403-00 - EGR Control Circuit Open ? Disabled Fault.** P225D-00 - NOX Sensor 1/1 Performance Signal Stuck Low. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance Bank 1. P200B-00 - Intake Manifold Runner Performance Bank 2. P2610 - PCM Internal Engine Off Timer Performance. P015E - Excessive Time to Enter Closed Loop Fuel Timing Control. P0534-00 - AC Refrigerant System A Charge Loss. P26FB-00 - EGR Cooler Bypass Control Stuck Closed Bank 1. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P2D2D-00 - Cold Start Intake Manifold Runner Performance Bank 1. P2D2E-00 - Cold Start Intake Manifold Runner Performance Bank 2. P2199-00 - Intake Air Temperature Sensor 1/2 Correlation. P22FA-00 - NOX Sensor Performance Slow Response High To Low Bank 1 Sensor 1. P2002-00 - Diesel Particulate Filter Efficiency Below Threshold. P0087-00 - Fuel Rail Pressure Too Low. P0128-00 - Thermostat Rationality (additional software enhancement). P0300-00 - Multiple Cylinder Misfire (cold ambient temperature). P0301-00 - Cylinder 1 Misfire (cold ambient temperature). P0302-00 - Cylinder 2 Misfire (cold ambient temperature). P0303-00 - Cylinder 3 Misfire (cold ambient temperature). P0304-00 - Cylinder 4 Misfire (cold ambient temperature). P0305-00 - Cylinder 5 Misfire (cold amb
S1623000028 Rev.2023-02-13. Service bulletin. VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S21080001702023-01-17. Service bulletin. PARKING BRAKE. Head unit button stuck DTC code B14DA-2A
90043982023-01-17. Service bulletin. PARKING BRAKE; VISIBILITY. GLASS, Mirror Replacement If the glass is found loose or detached from the glass holder, please return the Mirror Assembly to QEC for analysis.
08007202023-01-09. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; BACK OVER PREVENTION; PARKING BRAKE. UAQ and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to: UAQ radios - 34.2. UCQ - 30.24. 2019 LA and WD with UAQ or UCQ radios and 2020 WD with UCQ radio has been removed from the service bulletin and are now covered under a safety recall. Please refer to published information in DealerCONNECT/Service Library for more details. Customers may experience one or more of the following:Speaker crackling noise on non amplified vehicles (UAQ Only). Active call not transferred to vehicle Bluetooth®(UAQ Only). Voice Recognition (VR) not understanding commands to switch sources (UAQ Only). Bluetooth phonebook not available (UAQ Only). "Setting" button removed after ignition cycle (UAQ Only). Coolant temperature value incorrect (UAQ Only). Blank display screen at start up.
S20080001142022-09-26. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; PARKING BRAKE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. SXM Is Inoperative, Button Grayed Out Or Stuck In Loading Screen
08007202022-09-26. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; EQUIPMENT:ELECTRICAL:INFOTAINMENT; BACK OVER PREVENTION; PARKING BRAKE. UAQ and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to: UAQ radios - 34.2. UCQ - 30.24. 2019 LA and WD with UAQ or UCQ radios and 2020 WD with UCQ radio has been removed from the service bulletin and are now covered under a safety recall. Please refer to published information in DealerCONNECT/Service Library for more details. Customers may experience one or more of the following:Speaker crackling noise on non amplified vehicles (UAQ Only). Active call not transferred to vehicle Bluetooth®(UAQ Only). Voice Recognition (VR) not understanding commands to switch sources (UAQ Only). Bluetooth phonebook not available (UAQ Only). "Setting" button removed after ignition cycle (UAQ Only). Coolant temperature value incorrect (UAQ Only). Blank display screen at start up.
S21080001702022-09-26. Service bulletin. PARKING BRAKE. Head unit button stuck DTC code B14DA-2A
S2108000060RevB2022-09-26. Service bulletin. PARKING BRAKE. Service Park Assist Message Or Rear Park Assist Unavailable Message Displaying On The Cluster
S21080000812022-09-26. Service bulletin. PARKING BRAKE. Electronic Parking Brake (EPB) DTC?s Setting For Opposite Side of vehicle. EPB Circuits Swapped
90040052022-09-15. Service bulletin. PARKING BRAKE; BACK OVER PREVENTION. CAMERA (Rear) For concerns of back up camera flicker/blank/blue/black screen or camera inop, please ensure Radio is at latest software level. After update, system requires three sleep cycles to function properly. Please verify camera LVDS cable connection at camera and radio head unit. Also verify harness connection between chassis, body, and IP harness for bent pins or loose connection at XY400A, XY306A, XY552A. Please create and send a copy of the vehicle scan report and specify radio SW version and radio head unit ID to Bing Guo and Rafay Adil via email bingruo.guo@fcagroup.com (248) 500-7355 rafay.adil@fcagroup.com (248) 736-7059 Please call for any additional questions or assistance needed. If no response in 15 minutes, proceed with repair. Please be sure to attach a copy of the Vehicle Scan Report on the repair order.
08-041-212021-04-26. Service bulletin. PARKING BRAKE; STRUCTURE; ELECTRICAL SYSTEM. Flash: Body Control Module (BCM) Updates This bulletin involves updating the BCM with the latest available software. Customer may comment that after pressing the remote start button twice on the key FOB, vehicle will chirp once, and fail to initiate remote start.This issue may be accompanied by a low voltage remote start inhibit monitor.
S21080000812021-04-26. Service bulletin. PARKING BRAKE. Electronic Parking Brake (EPB) DTC?s Setting For Opposite Side of vehicle. EPB Circuits Swapped
90039502020-05-18. Service bulletin. PARKING BRAKE. Tailgate Cable 1. If replacing this cable for slack or loose on one side; first swap the cables left to right; does the issue follow the cable? a). If Yes, replace cable with slack. b). If No, a new shorter service cable PN 68488335A$ will resolve the issue if slack is greater than 18 mm of sag when compared to a straight edge from both ends of the cable. 2. If the issue improves following the left to right swap no further repair needed.
90042342020-05-18. Service bulletin. PARKING BRAKE; STRUCTURE. COVER, Front Seat Cushion For a seat cover that is loose at the seat frame attachment clips, please perform TSB 23-025-19 Seat cover replacement is not required

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