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How many o2 sensor das my 2011 hhr 2lt - Cars & Trucks

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Almost always cars have 2 sensors, Upstream or (o1 Sensor) and Downstream or (o2 Sensor). The first sensor will be at the front of the engine at the exhaust manifold and the second will be near you catalytic converter. o1 measures fumes coming out of the engine. o2 measures fumes reaching the exhaust pipes. Hope that helps.

Posted on Aug 14, 2019

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Posted on Jan 02, 2017

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Jeremy Moore

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SOURCE: I have a 2006 HHR

Since this is a 2006 Chevrolet, it is probably your brakes making this sound.
You will also want to check your splash shields underneath the vehicle to make sure they are not loose and rubbing.
Where would you say the growling sound is coming from? Is it coming from the Engine compartment, wheel well, etc?

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Posted on Apr 14, 2011

txslim55

txslim55

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SOURCE: How to change map sensor 2011 ecotec 2.2 in hhr

MAP sensor remove and replace 2003 Impala many other GM models

Posted on Aug 09, 2015

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I have a 2006 HHR 2LT and it is making a loud growling sound as I drive.


Since this is a 2006 Chevrolet, it is probably your brakes making this sound.
You will also want to check your splash shields underneath the vehicle to make sure they are not loose and rubbing.
Where would you say the growling sound is coming from? Is it coming from the Engine compartment, wheel well, etc?

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

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