Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 346 bulletins for IC BUS
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
IK2600255
Nov 22, 2021
060000 ENGINE AND ENGINE COOLING
Greenhouse Gas Phase 2 Regulatory Compliance Implementation
21507 Interim
Nov 9, 2021
060000 ENGINE AND ENGINE COOLING
With the vehicle in motion, the engine control module (ECM) may set a fault code resulting in engine shut down without warning; Only models built with PSI gasoline or LPG engines
21508 Interim
Nov 9, 2021
060000 ENGINE AND ENGINE COOLING
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 PSI gasoline or LPG engines.
IK2600254
Oct 14, 2021
110000 ELECTRICAL SYSTEM
New or replacement body control Module (BC,BCM) not detected; Gen 4 BCM
IK0700115
Sep 30, 2021
060000 ENGINE AND ENGINE COOLING
QLS Emergency Calibration; Models equipped with 2016 and newer Cummins B6.7, X15 and L9 engines or International A26 engine.
21111
Aug 17, 2021
060000 ENGINE AND ENGINE COOLING
Certain CE series buses may have been programmed with the incorrect parameter setting that may impact regeneration switch functionality.
21506
Aug 6, 2021
160000 STRUCTURE
Certain school buses may not conform to Federal Motor Vehicle Safety Standard (FMVSS) 217 a?? the exit opening configuration may not meet the minimum exit opening criteria.
IK2300002
Jul 20, 2021
110000 ELECTRICAL SYSTEM
Faults setting due to fast key cycle; Electric bus only
IK1900263
Mar 15, 2021
060000 ENGINE AND ENGINE COOLING
Bus with Cummins B6.7 engine and Dual A/C - Cylinder Head Failures
IK2501419
Mar 1, 2021
110000 ELECTRICAL SYSTEM
CE Bus Radio PA not switching to external / internal speakers; only models with feature codes 49CLM or 49CLN
20903
Jan 22, 2021
040000 SERVICE BRAKES, AIR
The electrical harness to the air dryer heater may have been assembled without the ground circuit for the heater element to function. School bus only; NOT TRANSIT BUS
IK1500103
Jan 20, 2021
081100 FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
Acceptable Propane Fill Adapter for Refueling
IK1201452
Nov 24, 2020
060000 ENGINE AND ENGINE COOLING
CPA RCT (relative compression test) for PSI propane or gasoline V8 8.8L engines; School bus models
20112
Sep 10, 2020
072200 FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
Certain IC BusA? CE buses may be built with Webasto fuel lines routed incorrectly.
20110
Aug 31, 2020
061100 ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
Certain school buses equipped with PSI gasoline or propane engines may have engine blocks without the counterbore machined where the oil pressure sensor is installed.
IK0300073
Jul 9, 2020
020000 SUSPENSION
Front Suspension Spring Rattle on RE Bus; only models with feature codes 03ADC or 03ADD mechanical springs
IK2200147
Apr 17, 2020
080000 FUEL SYSTEM, DIESEL
CE Bus fuel sending access hole in wrong location; only models with feature 47AEU built between 5/7/19 and 2/19/20
IK2200001
Apr 13, 2020
356000 EQUIPMENT ADAPTIVE/MOBILITY
Bus Air Conditioning Service Contacts for HVAC Information
20901
Apr 1, 2020
060000 ENGINE AND ENGINE COOLING
To improve the Oxygen Sensor 2 (O2 sensor 2) On Board Diagnostics (OBD) monitor performance.
IK1300185
Jan 30, 2020
060000 ENGINE AND ENGINE COOLING
Reduced ISB Engine Exhaust Brake Efficiency; Only vehicles with Allison 1000/2000 series transmissions