Bobbya1a

I recently purchased a 2008 hhr ss and the boost gage only shows
Negitave boost any help is appreciated thanks

donbrew

Any lights on the dashboard?

RJ_RS_SS_350

Hi Bobby, to the forums!!

You should check to see if there are any CEL (OBD2) codes stored. Your local auto parts store may be able to read them for you. Post them up here, just the codes, not descriptions, which can sometimes be misleading.

Also understand that you need to get into the throttle pretty good to generate boost. Light throttle won't do it.

Bobbya1a

I check with my scanner 2 codes came up
P0100 and p0113

RJ_RS_SS_350

Right after the plastic pipe leaves the airbox to go to the turbo, is the MAF sensor. Make sure that the electrical connector is plugged in. If it is, you may need to clean the MAF sensor(with specific MAF sensor cleaner). Do you have an oiled(i.e. K&N etc.) air filter?

Bobbya1a

I changed the air filter with a stock one and ordered a air flow sensor

Bobbya1a

Changed air flow sensor now have 7 codes
P0101 x2
P0300
P0301-04
I know the 300 codes are miss fire

RJ_RS_SS_350

Here is the first search result for P0101, it has some good info.

https://www.obd-codes.com/p0101

Oldblue

Welcome to the site, let's start with your first codeP0100

https://www.obd-codes.com/p0100

I'd start there and throughly check the wiring harness and use MAF sensor cleaner, to clean the MAF

Next that second code, P0113, let's check the wires and connections
Also look at the ground wires and ECM connections.

https://www.obd-codes.com/p0113


Now let's take a look at the fuse box, these are known to loosen up and cause problems, are all the fuses and relays in place tightly and are the contacts clean

We'll wait, no rush, wish you were closer, we'd help!

DrLoch

Both code appear to be pointing to the MAF sensor.