OBD Guide
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P0073

Ambient Air Temperature Sensor Circuit A High

P0073 is an OBD-II diagnostic trouble code meaning: Ambient Air Temperature Sensor Circuit A High. Common causes: ambient temperature sensor malfunction, broken wiring in the sensor circuit. Estimated repair cost: $6–89.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–89 (est.)

Symptoms

  • Incorrect display of outside temperature on the dashboard
  • Incorrect operation of the air conditioning system
  • Problems with automatic climate control
  • Slightly increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Ambient temperature sensor malfunction
  • Broken wiring in the sensor circuit
  • Short circuit of wires to power
  • Corrosion or oxidation of connector contacts
  • Damage to wiring due to mechanical stress
  • Malfunction of the engine control unit (rare)

How to Fix

  1. Connect the diagnostic scanner and read the error codes
  2. Locate the ambient temperature sensor (usually in the front bumper)
  3. Visually check the condition of the sensor and wiring
  4. Measure the resistance of the sensor with a multimeter
  5. Check the integrity of the wiring from the sensor to the ECU
  6. Check supply voltage and signal circuits
  7. Clean the connector contacts from corrosion if necessary.
  8. Replace the sensor if a fault is detected
  9. Repair damaged wiring
  10. Clear error codes and test drive

Related codes

P0072P0074P0183P0184

Error P0073 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0073 code mean?

P0073 is an OBD-II diagnostic trouble code that indicates: Ambient Air Temperature Sensor Circuit A High

What causes a P0073 error code?

The most common causes of P0073 include: Ambient temperature sensor malfunction; Broken wiring in the sensor circuit; Short circuit of wires to power; Corrosion or oxidation of connector contacts.

How do I fix a P0073 diagnostic trouble code?

To fix P0073: Connect the diagnostic scanner and read the error codes. Locate the ambient temperature sensor (usually in the front bumper). Visually check the condition of the sensor and wiring. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0073?

Yes, but get it checked soon

How much does it cost to fix P0073?

The estimated repair cost for P0073 is $6–89. Actual cost depends on your vehicle, location, and labor rates.

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