B0178

Output Air Temperature Sensor 2 Circuit

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–111 (est.)

Symptoms

Incorrect air temperature in the second zone of the cabin
The climate control for the passenger does not work / does not work correctly
Hot/cold air on one side only
HVAC Error Indication

Causes

Open/short circuit in wiring harness
Poor contact in the sensor connector
Air temperature sensor malfunction
HVAC Control Module Problems
Contact corrosion

How to Fix

Visual inspection of the wiring harness and connectors
Checking sensor resistance (compare with specs)
Checking voltage and ground in the sensor circuit
Replace the sensor if necessary
Repair/replacement of damaged wires
Cleaning oxidized contacts
Resetting the error and checking the system operation

Related codes

B0177 B0179 B0183 B0188