Error code

OBD2 P0072

OBD2P0072
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Ambient Air Temperature Sensor Circuit Low.

Severity

moderateCan continue driving, but climate control issues may be noticeable.

Summary

P0072 indicates an issue with the ambient air temperature sensor circuit providing low input to the ECM or CCM. This sensor is typically located in front of the radiator and can be damaged by road debris, corrosion, or poor connections.

Symptoms

  • Malfunctions in the climate control system such as failure of 'Auto' mode, inconsistent heating/cooling, or air-conditioning compressor issues
  • Inaccurate exterior temperature display on instrument cluster or climate control head unit

Common Causes

  • Damaged ambient air temperature sensor due to road debris or corrosion
  • Poor electrical connections or wiring damage
  • Corrosion in the connector of the ambient air temperature sensor
  • Low battery voltage affecting sensor readings

Diagnosis

  1. Inspect and test the ambient air temperature sensor for resistance changes with varying temperatures
  2. Check the wiring harness and connector for damage or corrosion
  3. Verify proper voltage readings at the sensor connector

Fixes

  • Replace damaged or faulty ambient air temperature sensor

FAQ

Can I drive with P0072?

Yes, you can continue driving but may experience issues with the climate control system.

What causes P0072?

Common causes include damaged sensors due to road debris or corrosion, poor electrical connections, and low battery voltage affecting sensor readings.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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