P0070 Code - Ambient Air Temperature Sensor Circuit

What Does Code p0070 Mean?

The Power Control Module (PCM) receives information from the ambient air temperature sensor. With this information, the Power Control Module (PCM) is able to monitor and balance the ambient air temperature with the intake air temperature. If the Power Control Module (PCM) reads that the ambient air temperature and intake air temperature are not at the correct levels, the PCM will store the P0070 code and trigger the Check Engine Light to illuminate.

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What are the common causes of P0070 ?

• Open in the signal circuit to the AAT sensor
• Short to voltage in the signal circuit to the AAT sensor
• Short to ground in the signal circuit to the AAT sensor
• AAT sensor faulty
• Failed PCM - unlikely

What repairs can fix the P0070 code?

• Repairing broken or shorted wires
• Cleaning corrosion from connector and/or electric circuitry
• Replacing the ambient air temperature sensor

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