WenmarOpen by Wenmar Pro

Service bulletins for the 2021 Jeep Compass

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
1126392026-07-08. Service bulletin. ENGINE. THROTTLE BODY – NONE
1126402026-07-08. Service bulletin. ENGINE. THROTTLE BODY – NONE
1128422026-07-02. Service bulletin. ENGINE. BOLT - HEX FLANGE HEAD
08-387-252025-12-11. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Not applicable to vehicles built for US market. Alternator Decoupler Pulley Failure Customers may experience one or more of the following: ● The alternator pulley may spin freely due to a decoupler failure. NOTE: This condition may cause the alternator not to charge the battery. ● Vehicle will not start due to a depleted battery. ● Battery symbol displayed in the Instrument Panel Cluster (IPC). ● Noise head from the alternator. This bulletin involves replacing the alternator pulley, belt and cap.
09-028-252025-10-29. Service bulletin. ENGINE. Not applicable to vehicles built for US market. Drivers Monitoring Module Manifold Absolute Pressure (MAP) Sensor Not Installed Properly Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P006D-00 - Barometric Pressure - Inlet Air Pressure Correlation. ● P012C-00 - Turbocharger/Supercharger Inlet Air Pressure Sensor 1 Circuit Low. ● P012D-00 - Turbocharger/Supercharger Inlet Air Pressure Sensor 1 Circuit High. ● P1189-00 - Inlet Air Pressure Sensor Circuit Low. ● P1190-00 - Inlet Air Pressure Sensor Circuit High. This bulletin involves measuring the distance between the lower base of the MAP sensor and the surface of the intake air line and, if required, replacing the MAP sensor.
08-217-25 REV. A2025-10-29. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Not applicable to vehicles Alternator Pulley Cap Failure Customer may comment on one or more of the following: NOTE: **There will be multiple indicators and messages will display on the Instrument Panel Cluster (IPC) with no Diagnostic Trouble Codes (DTCs):** ● Vehicle will not start due to a depleted battery. ● Noise heard from the engine compartment. ● Battery Symbol. ● Service Transmission. ● Check Diesel Exhaust Fluid (DEF) System. ● Anti-Lock Brake System (ABS) Service Required. ● Service Park Brake. ● Engfine Stop/Start (ESS) Unavailable "Service Battery".
09-018-252025-07-23. Service bulletin. ENGINE. Engine Cylinder Block Porosity Inspection - Engine Cold Start Rough Idle Customers may experience the following: ● Rough engine idle when cold starting the engine. ● Low coolant level in coolant recovery bottle.
91006242025-07-17. Service bulletin. ENGINE. Verify Reman part number availability. Order the "R" part number for all orders:
09-005-252025-03-25. Service bulletin. ENGINE; POWER TRAIN. "Various Models - Engine Valley Cap (Flywheel Side) - Oil Leakage - Service Solution Customers may experience the following: ● Oil leaks from the engine compartment, engine/transmission coupling. This bulletin supersedes Technical Service Bulletin (TSB) 09-021-24, date of issue November 23, 2024, which should be removed from your files. All revisions are highlighted with **asterisks** and include new Labor Times."
1029342025-02-05. Service bulletin. ENGINE. THROTTLE BODY
09-021-242024-11-25. Service bulletin. ENGINE. "Various Models - Engine Valley Cap (Flywheel Side) - Oil Leakage - Service Solution Customers may experience the following: ● Oil leaks from the engine compartment, engine/transmission coupling. When the claimed fault is confirmed, replace the engine valley cap, according to the Repair Procedure"
S1408000384 REV.F2024-07-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE. "Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On "
9100338REV12024-06-04. Service bulletin. ENGINE. "GENERATOR Engine Prior to alternator/generator removal: 1. Inspect & check all electrical connections to the alternator a. 2-way connector containing field control circuit & alternator sense voltage circuit. b. Unplug & plug-in the 2-way connector for field & sense circuit. Verify the connection is tight & check for any bent pins in alternator connector or damage to female terminals in connector. c. Check Alternator B+ Stud connection to be sure nut is securing positive cable terminal properly (i.e. nut is clamping terminal & connection is tight). d. Check fuse between the alternator B+ stud & PDC terminal to make sure it is not blown. e. Be sure to follow service manual sections on ALTERNATOR CONTROL CIRCUIT DIAGNOSTIC & ALTERNATOR SENSE CIRCUIT DIAGNOSTIC looking for any opens & shorts (to ground or battery voltage). 2. Check/verify all grounds in the charging system circuit a. Check tightness of mounting bolts securing alternator to engine block. Alternator is a case ground component. b. Check main ground from engine to chassis; connection must be tight. c. Check battery ground cable connections are tight. d. Potentially, loosen alternator mounting bolts, without removing alternator, and re-tighten to torque specifications in service manual. e. After all steps above are complete, re-start engine & check charging system operation. 3. Verify that the Smart Charging System is not the reason for alternator low voltage & current output (Amps). a. Alternator charging can be suspended during engine idle operation because of the Smart Charge strategy. b. Refer to service manual section ""System Operation - Smart Charging System"". c. Refer to Star Case S2008000031 Rev A for low charging voltage & Smart Charge Mode Voltage Range diagram & mode descriptions. d. The alternator has no internal regulator; thus, has no smart circuitry. All alternator control signals come from ECM. 4. If alternator is faulty, remove alternator & mounting bolts. Return alternator with bolts for analysis at QEC."
07007232023-07-31. Service bulletin. ENGINE AND ENGINE COOLING. Water Quality When Mixed With Engine Coolant
18053232023-07-31. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates Customers may experience the following: ? Vehicle repeatedly cranks when Engine Stop/Start (ESS) is active but engine doesn?t restart. Pushing switch, engine starts normally. This bulletin involves reprogramming the PCM with the latest available software.
18048232023-05-30. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK
S21090000042023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. Issue involves overheating, running hot, coolant leaks and related symptoms after a Mopar replacement engine has been installed in the vehicle.
S21240000072023-01-17. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. A/C Does Not Cool Properly
S22080000732023-01-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting
S22090000042022-12-19. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. If a Mopar oil filter is not available, use a filter that meets or exceeds USCAR36 specification and is compatible with semi and full synthetic oils.
S21090000042022-09-26. Service bulletin. ENGINE AND ENGINE COOLING. Issue involves overheating, running hot, coolant leaks and related symptoms after a Mopar replacement engine has been installed in the vehicle.
S1809000007RevC2022-09-26. Service bulletin. ENGINE AND ENGINE COOLING. Customer Complaint May Include Engine Oil Leak Or Consumption
14001212022-09-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR; UNKNOWN OR OTHER; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. Difficulty Starting the Vehicle on the First Attempt Due to Possible Leaking Fuel Injectors This bulletin involves replacing all four fuel injectors due to a no start condition on the first attempt. Customers may experience the following:After the engine remains stopped for more than an hour, the engine does not start on the first try, cranking for more than five seconds, when a second attempt is tried the vehicle starts fine.
18-085-222022-06-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE; POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); SERVICE BRAKES; ELECTRICAL SYSTEM. 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, a technician may find one or more of thefollowing DTCs have been set: P0031 - O2 Sensor 1/1 Heater Circuit Low. U0418-00 - Implausible Data Received From Brake System Control Module 1. Customers may experience the following: Long engine cranking prior to vehicle start more noticeable when the outsidetemperature is above 40 °c (104 °f).
S18090000072022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Customer Complaint May Include Engine Oil Leak Or Consumption

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