# Service bulletins for the 2018 Peterbilt 389

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.

53 bulletins from NHTSA, as of 2026-10-19.

- [42\-070](/bulletins/11038569.md), 2026-10-17, Service bulletin: UNKNOWN OR OTHER. Due to supplier constraints, an authorized aftermarket surge tank has been made available.
- [P001](/bulletins/11037541.md), 2026-09-29, Service bulletin: ENGINE. "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
- [E343](/bulletins/11037451.md), 2026-09-23, Service bulletin: ENGINE. An exhaust manifold slip joint seal kit is now available for EPA 2017\-2024 PACCAR MX\-13 engines.
- [E311](/bulletins/11035343.md), 2026-07-30, Service bulletin: ENGINE. 105 chassis have been removed from the chassis list and unflagged in PRWS due to expiration of applicable warranty coverage. Total chassis population is 732.
- [E311](/bulletins/11035111.md), 2026-07-21, Service bulletin: ENGINE. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
- [45\-070](/bulletins/11032293.md), 2026-05-06, Service bulletin: ENGINE. The attached procedures document has been updated with more detail and explanations. This is not a stand\-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
- [E326](/bulletins/11032284.md), 2026-05-06, Emissions: ENGINE; ELECTRICAL SYSTEM. EPA17\-24 MX Fuel Injector Connector \- This bulletin has been revised to include all EPA17\-24 and CARB24 PACCAR MX engines.
- [45\-070](/bulletins/11028314.md), 2026-02-05, Service bulletin: ENGINE. Procedure pictures updated for clarity. When troubleshooting Cummins X15 fault codes 555 or 556, follow this additional testing, inspection, and documentation procedure to help identify the root cause of dusted engines. This is not a stand\-alone process but must be used alongside Cummins troubleshooting steps. Cummins Quickserve will reference this bulletin for fault codes 555 or 556.
- [T016 / 26\-040](/bulletins/11019217.md), 2025-06-05, Service bulletin: POWER TRAIN. T016: Warranty section updated to include 0.5 hours for test drive. Recommended Repair T016C has been updated from 6.4 hours to 6.9 hours. SRT codes updated in PRWS Claim Coding Table: B25\-17A for 6.9 hours created to replace all other codes. 26\-040: Warranty section updated to include 0.5 hours for test drive. Recommended Repair 26040C has been updated from 6.4 hours to 6.9 hours. SRT codes updated in PRWS Claim Coding Table: B25\-17A for 6.9 hours created to replace all other codes.
- [32\-025](/bulletins/11010926.md), 2024-12-03, Service bulletin: ENGINE. Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting issues. A new Starter Troubleshooting Guide has been created to provide a comprehensive list of starting system checks, which should reduce unnecessary starter replacements and associated warranty claims. Engine starting system warranty claims now require a completed Starter Checklist, a Battery Pack Midtronics Report, and a Cable Drop Midtronics Report. Claims filed without these documents may be denied.
- [02\-194](/bulletins/11010896.md), 2024-12-02, Service bulletin: POWER TRAIN. Fix\-As\-Fail The window switch fails prematurely due to excessive amperage flowing through the window switch circuit. A new door harness design has been developed to prevent failures. Fix\-As\-Fail start date is 11/11/2024.
- [7\-700](/bulletins/11009757.md), 2024-11-05, Warranty extension: POWER TRAIN; ENGINE. 7/700 Service Agreement \- Letter Only.
- [16\-044](/bulletins/11005516.md), 2024-08-02, Service bulletin: SUSPENSION. Fix As Fail The height control valve \(HCV\) rod on vehicles with low air leaf suspensions is prone to toggling over center during rough road conditions. With full suspension articulation, HCV bracket flexes and toggles over center the HCV linkage, which results in either deflated airbags or makes them unable to inflate. Fix\-as\-fail start date is 07/30/2024.
- [32\-019](/bulletins/10232162.md), 2023-03-01, Service bulletin: STRUCTURE; ELECTRICAL SYSTEM. Fix As Fail – Chassis that were manufactured with certain battery cable routing brackets may experience rubbing or chafing of the battery cables.
- [01\-082](/bulletins/10227181.md), 2022-12-07, Service bulletin: VISIBILITY; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:CONDENSOR/EVAPORATOR. Certain model 389 chassis are experiencing freezing of the A/C evaporator or frosting of the compressor and suction line. A field resolution is available to solve this issue.
- [34\-093](/bulletins/10227167.md), 2022-12-05, Service bulletin: ELECTRICAL SYSTEM. 34\-093 Model 389 78\-inch Sleeper 12V Power Port Supplier Change
- [23\-005](/bulletins/10225580.md), 2022-11-04, Service bulletin: POWER TRAIN; VEHICLE SPEED CONTROL. Clutch pedal linkage lubrication service interval information is missing from the Service manual for Model 365, 367, and 389 chassis.
- [45\-064](/bulletins/10225578.md), 2022-11-02, Service bulletin: ENGINE AND ENGINE COOLING. Info Only \- PACCAR is introducing Over\-the\-Air \(OTA\) software updates for engine MY17 and newer chassis equipped with Cummins X15, X12, ISX12, ISX12N, L9N, PX\-7, and PX\-9 engines The technology will leverage the existing Remote Diagnostic cs hardware to deliver secure software updates remotely. This will reduce downtime and save on maintenance costs for eligible vehicles.
- [14\-043](/bulletins/10222269.md), 2022-10-05, Service bulletin: SUSPENSION. Fix\-As\-Fail On certain chassis with Low Air Leaf Suspension or Low\-Low Air Leaf Suspension, the Height Control Valve \(HCV\) arm may be rubbing on other components when the bend in the arm is facing outboard. Flipping the bend in the HCV arm inboard prevents the rub.
- [13\-060](/bulletins/10219235.md), 2022-09-06, Service bulletin: SERVICE BRAKES. The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
- [51\-013](/bulletins/10208758.md), 2022-03-04, Service bulletin: EQUIPMENT. Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile Gateway \(PMG001\) will experience severe 3G service degradation as early as January of 2022. Chassis currently utilizing 3G antennas as a primary antenna may experience this degradation.
- [21PBM](/bulletins/10206090.md), 2022-01-06, Service bulletin: SERVICE BRAKES, HYDRAULIC. Safety Recall – Work Brake May Unintentionally Disengage – NHTSA ID: 21V906, TC: 2021\-713. The work brake \(also known as winch brake\) may unintentionally disengage during winching operations, releasing the service brakes, increasing the risk of crash or injury. The VECU software will be updated to correctly set the speed interlock parameter.
- [43\-071](/bulletins/10201965.md), 2021-10-05, Service bulletin: FUEL SYSTEM, DIESEL. Fix\-As\-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid \(DEF\) sensors are available. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.
- [E271](/bulletins/10198760.md), 2021-07-06, Service bulletin: ENGINE AND ENGINE COOLING. An engine software update is required to resolve OBD system readiness, DEF doser diagnostics, and otherOBD system software related issues.
- [E265](/bulletins/10194769.md), 2021-06-02, Service bulletin: ENGINE AND ENGINE COOLING. Selected engines have been identified to receive a camshaft inspection and an update for improved camshaft lubrication.

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