This sensor also helps the Powertrain Control Module (PCM) to determine how much fuel to use on start-up. If this information is wrong then you might face rugged start-ups and hard idles and the sensor is not able to read the outside temperature correctly. The PCM also uses this signal as a logic reference for other temperature sensors on the engine. If the PCM detects an issue with the signal from this sensor, it will set code P0070.
What causes problem with the Ambient Air Temperature Sensor Circuit?
- Failed/Faulty Ambient Air Temperature Sensor - Corroded Electric circuitry and system connectors - Dirty sensors and circuit components
More Info About OBD Code P0070: https://partsavatar.ca/p0070-obd-ii-trouble-code-ambient-air-temperature-sensor-circuit-solution-instrument-cluster-pcm
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