U0614
Lost Communication With Intake Air Temperature Sensor 2 Bank 2
The vehicle bus reports loss of communication with smart IAT sensor 2 on bank 2 (typically post-intercooler). Charge-air density correction reverts to a substitute value.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Common causes
Ordered by how often each turns out to be the cause.
- Bus wiring open or shortedCommon
- Module without power or groundPossible
- Module failedPossible
Parts involved
- IAT Sensor 2 Bank 2
- Vehicle Bus Wiring
U0614 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.