I've had my 2006 HHR for about 4 years now, so far great car. I'm a fairly ok mechanic. Smog is due and I have the following issues:


P0128 - Coolant Thermostat - Two years ago had the same issue, changed out thermostat and temp control sensor, same error

P0340 - Camshaft Position Sensor - Bought one, looked through my Haynes Manual and all the web sites, and after 5 hours of looking for the sensor, came to the conclusion that the 2006 does not have one.

P1133 - HO2S


I just don't want to throw a bunch of money and time on this car, it has 189K miles

Any advise would be appreciated!

 

For that P0128, which thermostat did you install? We have documented that the AC Delco 131-158 180 degree thermostat is best and long lasting, the two year span indicates to me , another brand was installed. Also was the coolant drained and replaced with Dexcool 50/50 mix?

P1133, can just be a loose wiring connector at the upstream O2 sensor

as for the camshaft position sensor, which one? Intake or exhaust?


Part #7 in a 2.4 , which do you have? 2.2 or 2.4 ?

 

P0128 replace the t-stat with a GM 131-158 ONLY
P0340 do you have a 2.2L or a 2.4L? If it is a 2.2L you most likely need a new IgnitionControlModule.
P1133 most likely need a new #1 O2 sensor, that's the one closest to the enginre.