OBD-II code · Powertrain (generic)

P0070 Ambient Air Temperature Sensor Circuit A

Generic electrical fault in the ambient air temperature sensor A circuit. Used by the ECU for cold-start corrections, climate logic, and intake-air calculations.

Is it safe to drive with P0070?

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

Common causes

  • Most likelySensor element failed
  • PossibleWiring open or connector loose

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.