P0072: Ambient Air Temperature Sensor Circuit Low Input
MediumPowertrainEngine/Powertrain
What does P0072 mean?
P0072 is a diagnostic trouble code indicating "Ambient Air Temperature Sensor Circuit Low Input". The ECU is detecting a voltage reading that is below the expected range in the engine/powertrain circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Engine overheating
- Temperature gauge reading high
- Heater not working properly
- Intermittent warning lights
Estimated repair cost
Typical range in Australia (parts + labour)
$100 – $500 AUD
Common causes
- Damaged or corroded wiring harness
- Loose or disconnected electrical connector
- Failed engine/powertrain sensor or actuator
- Blown fuse in the related circuit
- Poor ground connection
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0072 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.