DTC B0160: Ambient Air Temperature Sensor Circuit Low: Testing

If DIC diagnostic system check has not been performed, perform DRIVER INFORMATION CENTER DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. If DIC diagnostic system check has been performed, go to next step.
If DIC displays "SC", go to next step. If DIC does not display "SC", DTC is not present at this time. Check for intermittent or poor connections in related electrical connections. See DIAGNOSING INTERMITTENTS . Repair wiring or connections as necessary.
Turn ignition switch to OFF position. Disconnect ambient air temperature sensor harness connector. Ambient air temperature sensor is located in front of radiator, right side of vehicle. Turn ignition switch to RUN position, with engine off. If DIC does not display "OC", go to next step. If DIC displays OC, go to step 5 .
Disconnect DIC connector. Test Light Green/Black wire between ambient air temperature sensor 2-pin harness connector terminal "A" and DIC harness connector terminal No. 10 for short to ground. See Fig 1 . If no problem is found, go to step 7 . If problem is found, repair as necessary. After repair, go to step 8 .

Fig 1: Identifying Driver Information Center Harness Connector Terminals
Courtesy of GENERAL MOTORS CORP.
Check for poor connections at ambient air temperature 2-pin harness connector. If no problem is found, go to next step. If problem is found, repair as necessary. After repair, go to step 8 .
Replace ambient air temperature sensor. After repair, go to step 8 .
Replace DIC. See DRIVER INFORMATION CENTER under REMOVAL & INSTALLATION. After repair, go to next step.
Using scan tool, clear DTCs. Operate vehicle under CODE ENABLE CRITERIA conditions. If DTC resets, go to step 2 . If DTC does not reset, system is okay.