when my engine is warm and i have the heat on the idle goes low? any ideas?

2006 CHEVROLET TRAILBLAZER
69,000 MILES
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CARDINALS5
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  • 2 POSTS
even after i turn the heat off it will still idle low sometimes but mostly when the heat is on especially when its blasted. my uncle thinks it may be the blower motor switch
Dec 9, 2011 at 7:46 PM
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RIVERMIKERAT
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It could be, but not likely. Have it scanned for codes and let us know what is found. Tell the shop, or whoever it is that does the scanning for you, that you need both hard and soft codes pulled.
Dec 9, 2011 at 8:23 PM
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CARDINALS5
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  • 2 POSTS
I get the codes idle to low P0506, and pulse modulation delivered torque malfunction B0244
Dec 10, 2011 at 6:38 AM
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RIVERMIKERAT
  • ✓Experienced Mechanic
  • 6,106 POSTS
Have you tried adjusting the idle yet?
Dec 10, 2011 at 11:10 AM
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