OBD-II code · Powertrain (generic)

P0072 Ambient Air Temperature Sensor Circuit A Low

Ambient air temperature sensor A signal voltage below the expected range — typically a short to ground.

Is it safe to drive with P0072?

Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.

Common causes

  • Most likelySignal wire shorted to ground

Repair at a glance

Difficulty
Easy
DIY friendly
Often, with basic tools
Typical labour
0.3–1 h
Emissions test
Usually unaffected
Parts involved
Ambient Air Temp Sensor, Sensor Wiring

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.