The Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have approved an...
International technical service bulletin 21901 for 2017-2022 International LT, 2017-2022 International HV and 2017-2022 International RH and others.
- Bulletin number
- 21901
- Component
- Engine and engine cooling
- Summary
- The Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have approved an emergency calibration to provide temporary relief from the global supply shortage of electrical components. When there is a communication fault in the DEF head unit / Quality Level Sensor (QLS) this temporary calibration will allow the vehicle to operate. The procedure in this document will include diagnosing the DEF head unit / QLS and if found to be defective will advise to install the temporary engine calibration if replacement parts are not available. Any vehicle that receives this calibration will be required to have it removed and a new QLS installed once parts become available, this will be managed through future communication.
Owners of these vehicles have filed 4 complaints in the engine category.
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