2009 hhr ls 2.2 L. I went to Autozone. They pulled the following codes:

P0171
P0101
P0131
P0137
P0300
P1133
Their system suggested bad intake manifold. Has anyone else experienced this? Any suggestions? I appreciate any assistance I can get.

 

Did you check the fuse marked EXH #33 underhood fuse box?

Check that the MAF is plugged in good.

Check for wires broken laying on hot surfaces.

Check the area marked 1

 

 

Thank you for the suggestions. I can rule out the flex pipe. It was recently replaced. I'll check the other things tomorrow.

 

 

All of the modules those codes relate to go to fuse #33. The MAF, the o2 sensors, the IAT (P0101, P0131, P0137, P1133). The modules not functioning cause the performance codes (P0171, P0300).

 

So far I haven't had any individual items checked. I only had the codes pulled. I checked fuse #33 and it's good. MAF sensor is plugged in good, but hasn't been tested. As much as I hate to spend the money, I think I'll end up taking it to a dealer and have it checked.

 

A good independent shop would be better than a dealer...

 

I agree 100%.

 

I want to thank everyone for the suggestions. I didn't know which shops I could trust, so I went to Chevy dealer. It ended up just being a broken rubber boot on the throttle where it goes into intake. They basically only charged me for the diagnosis.