This is on a 2006 HHR 2.2 Liter Auto trans LT . Engine has one coil for all cylinders and ignition control module. I read somewhere that a bad camshaft position sensor (CMP) intake side, may be causing my harsh/jerky shift when putting in gear. I have a diagram of the engine clearly showing location of (CMP) sensor just below (EVAP) purge valve.
When looking at my actual engine, there is no (cmp) sensor that I can see. Is this sensor integrated into the ignition control module somehow? Or in a different location for this particular year and engine size?

 

2006 did not have a cam position sensor. The Ignition Control Module calculates The cam position. You are not looking at a 2006 2.2L diagram. Maybe a 2.4L
And what you heard is wrong; that might be caused by bad com position Valves/Solenoids (which a 2006 2.2L does not have.
Are there any codes?

 

Harsh jerky shifts can be a dirty throttle body, dirty MAF sensor, dirty fuel injectors, loose or bent pins in the TCM connector. You don’t mention the mileage, how old are the spark plugs, the timing chain?
We are aware that the computers like 12.5 volts or better, so how is the battery? 12.3 volts or lower will cause problems

 

The correct spark plugs are important, too. ACDelco 41-103 iridium.

Strange, the 2006 owner manual lists 41-981, I haven't seen that one before. They should be equivalent. I've seen 41-105 in the owner manual before (can't remember which year or engine), but now it's not in any of them that I have!

Anyway, 41-103 is correct

 

Actually the 2006 2.2 is recommended the 41-105 iridium plugs AC Delco .
The 2006 2.4 is the 41-103

 

The 103 or 105 is the heat range. 41-105 is 2 steps hotter than 41-103. Probably because the wasted spark ignition, went to CoilOnPlug in 2007.
There is a spark on the exhaust cycle, a hotter plug would help burn any left over vapors to satisfy the EPA.

 

Thanks for response. The only code I'm getting is PO102, which popped up before the shifting problem. I've flushed trans 3x and replaced shift solenoids. Transmission starts acting up after reaching running temperature. Upon initial start-up, the transmission works fine.

 

The p0102 is causing the rough shifting. It is a problem with the MAF sensor. Do you have an oiled air filter?

 

Did you replace the air filter and forget to plug the MAF in?
Had you mentioned the code we could have saved you a lot of money.

 

If you’re sure you plugged it back in, are you sure it’s firmly plugged in ? Or did it wiggle loose?

https://www.obd-codes.com/p0102

To clean the MAF only use a spray cleaner designed for cleaning the MAF, it is a delicate device.



You can clean the throttle body while you’re at it.