Question

Will a P0171 make a P0326 code on a 2006 Chevrolet HHR 2.4L? check engine light is ON

Answer 1

P0171 Fuel trim lean Bank 1

P0336 Crankshaft position sensor

This is like saying will a lean running condition cause a crankshaft position sensor code, this would be unlikely, you have 2 separate condition, a lean fuel trim you can set if the MAF is not properly reporting or vacuum leak condition is occurring,

Answer 2

P0171 CHEVROLET Code - Fuel Trim System Lean Bank 1
Read more: https://www.autocodes.com/p0171_chevrolet.html

P0326 CHEVROLET Code - Knock Sensor Performance
Read more: https://www.autocodes.com/p0326_chevrolet.html