Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 346 bulletins for IC BUS
IK0800655
May 16, 2023
060000 ENGINE AND ENGINE COOLING
N2 telematics module not communicating with OCC systems. Only models built with feature codes 10ADT, 10AEY, 10AEU, 10AEZ, 10AGB, or 10AGC built from 04/04/2019 through 11/01/2022.
22502
May 10, 2023
060000 ENGINE AND ENGINE COOLING
Per agreement with EPA and CARB, Cummins, Inc. provided an emergency calibration for Cummins ISB, B6.7, ISL9, L9, and X15 engines when a DEF Quality Sensor (DQS) was not available. This action addressed the Diesel Exhaust Fluid (DEF) Qualit
23103
May 9, 2023
130000 VISIBILITY
These certain buses may have a rear A/C system compressor mounting bracket with insufficient clearance between the compressor and bracket that could result in rear A/C compressor lock up.
IK2300015
Mar 8, 2023
060000 ENGINE AND ENGINE COOLING
Electric Vehicle Coolant Pipe Contact CE EV buses only
22123
Nov 10, 2022
100000 POWER TRAIN
Certain electric buses may have been built without the Level 2 Manual Service Disconnects (MSDs). This document will walk the user through installing the Level 2 MSDs and high-voltage circuits needed.
22120
Nov 10, 2022
100000 POWER TRAIN
Certain EV Series vehicles may have been built with incorrect MSD removal instruction labels.
22519
Nov 2, 2022
060000 ENGINE AND ENGINE COOLING
In cold weather, especially during engine warmup, the engine may experience a misfire condition resulting in setting the Malfunction Indicator Lamp (MIL) and possible increase in emissions. Only models with Generation II PSI 8.8L LP engines
22119
Oct 27, 2022
353000 EQUIPMENT:ELECTRICAL
Certain buses may have outdated radio software that could interfere with the operation of the Public Address (PA) external speakers.
22514
Sep 6, 2022
010000 STEERING
As reported by R. H. Sheppard Co., Inc in their defect report to NHTSA (Recall 22E-047), an anomaly in the steering gear recirculating ball insertion operation occurred during assembly. Subsequent rework processes and inspections did not de
22513
Sep 6, 2022
010000 STEERING
As reported by R. H. Sheppard Co., Inc. in their defect report to NHTSA (Recall 22E-047), steering gears were assembled with fewer than the required number of recirculating balls which can lead to a fracture in the steering gear worm-shaft
22113
Jun 23, 2022
110000 ELECTRICAL SYSTEM
Certain Electric CE buses may have been built without the proper high voltage Identification labels
22509
Jun 10, 2022
180000 VEHICLE SPEED CONTROL
Certain 2022 and 2023 CE and RE school buses built with feature code 0008TXK or 0008TXM (Bendix Wingman Prewire option) may have been built without the warning label to notify the driver that the collision mitigation system is not operation
22508
Jun 10, 2022
180000 VEHICLE SPEED CONTROL
Certain 2022 and 2023 HV and MV series trucks and 2022 RE series commercial buses with feature codes 8TXK or 08TXM (Bendix Wingman Prewire option) may have been built without the warning label to notify the driver that the collision mitiga
22512
May 20, 2022
010000 STEERING
The steering wheel retaining nut may not have been torqued properly during assembly and may allow the steering wheel to loosen, and possibly separate from the steering column shaft.
22511
May 20, 2022
010000 STEERING
The steering wheel retaining nut may not have been torqued properly during assembly and may allow the steering wheel to loosen, and possibly separate from the steering column shaft.
22104
May 10, 2022
040000 SERVICE BRAKES, AIR
Certain IC RE school buses may have the ABS indicator light circuit incorrectly pinned at the relay and may have an outdated BCM calibration that could result in the ABS indicator light to stay on at all times
22103
May 10, 2022
040000 SERVICE BRAKES, AIR
Certain IC RE school and commercial buses may have outdated BCM calibration that could result in the ABS indicator light illuminating at all times
22901
Feb 8, 2022
040000 SERVICE BRAKES, AIR
The rear axle brake chambers may be installed in the incorrect mounting slot which could lead to long term durability issues.
21508
Jan 11, 2022
061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
With the vehicle in motion, the engine control module (ECM) may set a fault code resulting in engine shut down without warning. Only models equipped with certain PSI engines