Testing if display approx. -40 °C or approx. -46 °C:

-- Disconnect the Intake Air Temperature (IAT) Sensor 2 -G299- electrical harness connector -arrow-.

Fig 1: Identifying Intake Air Temperature (IAT) Sensor G42 Electrical Harness Connector

Courtesy of AUDI OF AMERICA, LLC

-- Using a jumper wire, connect the Intake Air Temperature (IAT) Sensor 2 -G299- electrical harness connector terminals 1 to 2.

-- Check the value indicated on the scan tool display.

Fig 2: 2-Pin Electrical Connector & Terminals

Courtesy of AUDI OF AMERICA, LLC

If indication jumps to approx. 140 °C:

-- End diagnosis and switch ignition off.

-- Replace the Intake Air Temperature (IAT) Sensor 2 -G299-. Refer to Repair information.

If indication remains at approx. -40 °C or -46 °C: