sic_infested

alright... this is a long story...i have a 2.0 ss/sc and i haven't done anything different to the car in a long time... last thing was the exhaust and that was 2 months ago... cars been fine for the longest time... i decided to hit the highway and when getting on the highway i redlined second.... no different then i do every now and then... no issues i start to shift to get to fifth and after about a minute of driving the car goes into limp mode... P0068 and P0121 r on... i clear them and drive back home... next day i take everything apart... intake and tb come out.... i clean the cone... clean the intake pipes.... clean the tb.... wipe off my MAF... wipe off my MAP... look inside my charger... everythings clean... wile my cone dries i inspect my couplings and all that... everything seems good... inside my charger it looks kinda dirty... i rubbed my finger in it and it was kinda gunky... looked like carbon buildup... same like on a tb... not sure if thats normal or not... but anyway i put everything back together better then it was originally and still get codes... this time P0068, P0121, P2228.... so i take out the MAP and test it and it seems to be getting a reading... i didn't have a gauge to use so i don't know if it was accurate but it did read something when i tested it... so i think thats fine... i let it sit for a day and decided to try to drive it... everything was good... no codes... no limp... i park it... eat dinner... get back in to go out with the gf... limp mode again... this time P0068, P0069, P0121, P2228... and i noticed that my rpm was reving up and down on its own... up to about 1500 and as low as 500 then back to about 800 again... so i parked the car and haven't touched it since... any idea's? tb? tps? maf? map?

rukkee

iTrader: (3)

DTC

DTC Descriptor

Module That Sets the DTC

Diagnostic Procedure



P0068


Throttle Body Airflow Performance


ECM, PCM

• DTC P0068 for the 2.0L engine
• DTC P0068 for the 2.2L (L61) engine
• DTC P0068 or P0121 for the 2.4L engine

P0069


Manifold Absolute Pressure - Barometric Pressure Correlation


PCM


DTC P0069

P0121


Throttle Position (TP) Sensor 1 Performance


ECM, PCM

• DTC P0121 for the 2.0L engine
• DTC P0121 for the 2.2L (L61) engine
• DTC P0068 or P0121 for the 2.4L engine


P2228


Barometric Pressure (BARO) Sensor Circuit Low Voltage


PCM


DTC P2228

Coblasts

Check your barometer pressure sensor and scip sensor connectors and wiring for damage..
(Take a good close look using a magnifying glass if you have one.)
May have been damaged by who ever changed your oil or they didnt clip the connectors on positively.

I noticed when changing the oil filter there is alot of interference with the connectors in that area even if your careful with a extension.

sic_infested

well i do my own oil changes so i do unplug the one sensor thats right above the filter... is that my barometer pressure sensor or scip sensor? i plugged that 1 back in for sure... i'll double check to make sure its all the way in... but thats the only sensor i know of in that area... i'll look at that tomorrow... a friend of mine is gonna bring me a tb to swap with and see if that fixes it... if thats the problem i'll order a new 1 and thats it... but i will look at that tomorrow and if u can be more specific as to where those 2 sensor r i will look at both... thanks

Coblasts

The scip is on the supercharger and the baro is behind it which would be the one you disconnect when you change the oil but not a 100 % on that one.

sic_infested

i thought the one on my charger is the MAP sensor? i'll have to look around at all the sensors in the area and make sure there all good

sic_infested

thew on a new tb today to try and see if that changed anything... only threw 2 codes this time... still went limp... P0068 and P0069