P0071

Ambient Air Temperature Sensor Range/Performance

DTC P0071, sometimes indicated as P007100 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing ambient air temperature sensor range/performance.

The ambient air temperature sensor measures the temperature of the air surrounding the engine. The PCM uses this information to calculate the air density and adjust the fuel mixture.
This code is set when the PCM detects a problem with the ambient air temperature sensor.
Possible causes include a defective sensor, a wiring problem, or a fault in the PCM.

  • P0071: Ambient Air Temperature Sensor Range/Performance
  • P0071: Ambient Air Temp. Sensor Range/Performance
  • P0071: Outside air temperature sensor – range/performance problem
  • P0071 00: Ambient air temperature sensor circuit - Incorrect input signal range or efficiency problem
  • P0071 00: Outside air temperature sensor - range/performance problem

See Also: Related Error Codes
DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • 9003803 - BACK OVER PREVENTION
    DODGE: Ambient temperature sensor if replacing an ambient temperature sensor on 2017 jc (journey) for P0070, P0071, P0072, or P0073 fault codes, please call omar jobe at cell (248) 910-2166. If you do not receive a response within 15 minutes, p
  • 9004547 - ENGINE AND ENGINE COOLING
    CHRYSLER: Ambient temp sensor psu- pentastar upgrade engine - ambient temp sensors after experiencing any P0070-11, P0070-15, P0071, P0072, or P0073 codes, follow the diagnostic procedure. If the procedure directs you to replace the ambient air temp
  • TSB 18-2342 - ELECTRICAL SYSTEM
    LINCOLN: Some 2017 continental vehicles built on or before 4-apr-2017 may exhibit an illuminated malfunction indicator lamp (mil) with diagnostic trouble code (dtc) P0071, inaccurate outside temperature readings, front parking aid faults with dtc b1
  • 17NA373 - EQUIPMENT:ELECTRICAL
    BUICK: This technical bulletin provides a procedure to replace the ambient air temperature sensor with the correct one due to the plant installing the incorrect one causing a malfunction indicator lamp (mil) illuminated and dtc P0071 set at pdi.
  • tsb17-2215 - POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
    FORD: Some 2017-2018 fusion vehicles equipped with a 2.5l engine and built on or before 18-aug-2017 may exhibit an illuminated mil with diagnostic trouble codes (dtcs) P0071 and/or P068A. Reprogram the powertrain control module (pcm) using integr
  • TSB17-2140 - ENGINE (PWS)
    LINCOLN: Some 2017 continental vehicles built on or before 4-apr-2017 may exhibit an illuminated malfunction indicator lamp (mil) with diagnostic trouble code (dtc) P0071, inaccurate outside temperature readings, front parking aid faults with dtc b1
  • TSB 17-2072 - POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)
    LINCOLN: Some 2017 c-max/fusion hybrid/energi and mkz hybrid vehicles may exhibit an illuminated mil with dtc P0071 stored in the powertrain control module (pcm). This dtc can be set after the vehicle is stored inside a warm location for several hou
  • SSM 46410 - ENGINE (PWS)
    LINCOLN: Some 2017 fusion hev/phev, c-max hev/phev, and mkz hev vehicles may exhibit an illuminated mil with dtc P0071 and/or degraded hvac performance in automatic mode only with an ambient temperature reading of 50 degrees f displayed in the messa
  • SSM 46285 - EQUIPMENT:APPLIANCE:AIR CONDITIONER
    LINCOLN: Some 2017 fusion hev/phev, c-max hev/phev, and mkz hev vehicles may exhibit an illuminated mil with dtc P0071 and/or degraded hvac performance in automatic mode only with an ambient temperature reading of 50 degrees f displayed in the messa
  • 122-Z5F3L-09 - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
    PORSCHE: The customer observes an mil. The technician is able to verify the mil and notices fault code P0071 stored in the dme. Pcna is aware of this this issue. As background information, the fault is caused by the temperature sensor not communicat
Consumer Complaints for this DTC



2013 FIAT 500 with 106600. miles

Cel alert: P0071 obd ii error ambient air temperature. The forums are full of people trying to find out how to fix this. There is a faulty thermostat in the passenger side mirror that requires the entire mirror to be ( $117 from auto zone ) a 25 thermostat is the only thing that should actually need replacement
ELECTRICAL SYSTEM, UNKNOWN OR OTHER POWER TRAIN ELECTRICAL SYSTEM POWER TRAIN UNKNOWN OR OTHER

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