OBD-II code · Powertrain (generic)
P0071 Ambient Air Temperature Sensor Circuit A Range/Performance
The ambient air temperature reading is electrically valid but implausible compared to other temperature sources (intake air temp, coolant at cold start).
Is it safe to drive with P0071?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor reading drifted
- PossibleSensor exposed to engine heat
- Less likelySensor element aged beyond calibration window
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
Related codes
- P00DAAmbient Air Temperature Sensor Circuit B Range/Performance
- P006ETurbocharger/Supercharger Boost Control A Supply Voltage Circuit Low
- P006FTurbocharger/Supercharger Boost Control A Supply Voltage Circuit High
- P0070Ambient Air Temperature Sensor Circuit A
- P0072Ambient Air Temperature Sensor Circuit A Low
- P0073Ambient Air Temperature Sensor Circuit A High
- P0074Ambient Air Temperature Sensor Circuit A Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.