Code Definition

P0070 — Ambient Air Temperature Sensor Circuit

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0070

P0070 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0070 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0070 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0070 code indicates an issue with the ambient air temperature sensor circuit. This sensor measures the temperature of the air outside the vehicle and provides data to the Engine Control Module (ECM) for various control functions, including climate control and engine management. The ECM sets this code when it detects a malfunction or abnormal reading in the ambient air temperature sensor circuit.

Quick Facts