2014 Peterbilt 388 Technical Service Bulletins

24 technical service bulletins (TSBs) are on record for the 2014 Peterbilt 388. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11037541Sep 11, 2026Engine. "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."
• 11010926Nov 22, 2024Engine. 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…
• 11010896Nov 11, 2024Transmission and drivetrain. 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.
• 10219235Aug 3, 2022Brakes. The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
• 10188550Feb 10, 2021Visibility (wipers, defrost, mirrors), Equipment. Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
• 10179370Aug 25, 2020Body and structure, Electrical system, Equipment. Fix as Fail: Peterbilt has determined that certain model 348, 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4/13/2010 and 3/16/2020 and equipped with a flush mounted battery box, utilized rubber washers that could rub through and cause the aluminum box mounting tabs to rub directly on the steel frame brackets. This could result in cracked battery box mounting angles. Resolution is to…
• 10177019Jun 10, 2020Engine cooling, Body and structure. Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and built from 03/6/2006 to 1/20/2020, the clamps that secure the SOC exhaust stacks may not be tightened properly. This may allow the exhaust stack to rotate and contact the cab or sleeper.
• 10177021Jun 8, 2020Electrical system. Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
• 10176033May 29, 2020Transmission and drivetrain. Information only: Hendrickson Softek front axle maintenance intervals and requirements.
• 10173205Mar 17, 2020Equipment. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
• 10173212Mar 3, 2020Vehicle speed control, Electrical system. Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.
• 10172036Feb 28, 2020Vehicle speed control, Electrical system. Information Only: Vehicles may have the connector seal on the wheel speed sensor incorrectly installed, which may lead to sensor corrosion.
• 10169787Dec 18, 2019Electrical system. Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures.
• 10168703Nov 6, 2019Engine cooling. Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor.
• 10165711Sep 27, 2019Suspension. Non Safety Campaign: Peterbilt has determined that certain Model 365, 384, 386, 388, 389, 3895, 587 and 579 vehicles built between March 27, 2012 and January 20, 2019 with Flex Air suspension in a 6x2 configuration have U-bolts that may fail prematurely.
• 10165583Sep 27, 2019Engine cooling, Equipment. Information Only – This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).
• 10164375Aug 23, 2019Engine cooling. Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
• 10162392Jun 10, 2019Electrical system. Information Only - Quick Reference Guide for Electric harness damage repairs.
• 10159674Apr 8, 2019Equipment. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
• 10154733Jan 4, 2019Electrical system. Information: Bendix ACOM Software version 6.16.5.0 for diagnostics may introduce an unrecoverable error. Notice to dealers to replace this version with older software version until Bendix introduces new version.
• 10143649Jul 23, 2018Electrical system. Information - Recommended Practices for Updating ESA Software
• 10128643Jan 22, 2018Wheels. Fix-As-Fail ? There is an updated plug to fix leaking steer axle hubcaps.
• 10056314Aug 11, 2014Transmission and drivetrain. Peterbilt: see document search button for owner letter. Certain trucks, at time of assembly, may not have a properly seated upper reverse idler feed tube (oil supply line), resulting in bearings having reduced oil pressure.
• 10056025Jun 27, 2014Engine, Electrical system. Peterbilt: the malfunction indicator lamp (mil) illuminates due to an engine control unit (ecu) software issue, rear nox sensor, operating correctly.

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