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My reduced  engine power light started coming on now I have all these codes. Runs rough, idles high at first then almost dies if you turn on your heat or air. There is oil all over the TCPS and electrical plug as well. My change oil, check engine, & reduced engine power lights come on.
Vehicle: 2003 Chevy Trailblazer LS 4.2

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P0107 Manifold absolute pressure circuit low input

P0014 Exhaust camshaft position

P0137 H02S below voltage

P1271 Accelerator pedal position sensor 1- 2 correlation

There are some code that are set due to another code being set, P0137 will set when a P0107 is set, P0014 is cause when the variable valve timing  for the exhaust is advance this would create a internal vacuum leak where you would have the rough idle this can cause a P0107 , P0107 is set when the ECM see its 5 volt circuit given and in return its signal voltage went low. this more than likely was set due to P0014. As for the fan clutch this vehicle has to have the electro-viscous fan clutch a fault here cause the transmission to delay shift and the RPM to go high. and yes in some cases there was P1271. with a P1639 which would be with the 5 volt reference circuit, which you do not have. P0014 resolve that first. clear code and go from there

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