Chevrolet P166B: Intake Air (IA) Heater Over Temperature

Is your scanner showing Chevrolet P166B?
No worries. We'll show you what it means and how to deal with it.

Presented by

Randy Worner

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OVERVIEW

Severity

High

DIY Difficulty Level

Advanced

Repair Cost

$300-$500

Can I Still Drive?

What Does The Chevrolet P166B Code Mean?

Conditions for setting the DTC:

The intake air heater is commanded ON The engine is running for more than 40 seconds.
Engine coolant temperature is less than 60°C (140°F).
Battery voltage is between 9-16 V.
The IAH temperature is more than 80°C (176°F) for more than 3 seconds.

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

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