The check engine light is on.I turned the a/c on full blast and it is not cooling and the blower did not come up to full speed until i turned the switch to defrost and it cools fine.The next problem i noticed is the passenger side window would not work at first but after several attempts it finally started working.The last and most concerning is after driving for 15 min or so and the engine comes up to temp I have noticed that while at a complete stop at a red light i can take my foot off the brake and the car starts jerking terrible and is hesitating or buckinguntil i start accellarating then it stops.please help
misc. electrical problems. on 2008 Dodge Charger
by mike100 in Clayton, NC on February 16, 2011
ANSWER by patrick mannion on February 16, 2011
The bucking and jerking is most likely what has brought on the Check Engine Light. Your car has On Board Diagnostics (OBD2). A 16 pin diagnostic socket under the dash allows a scan tool to be attached to interrogate the on board computer in your car. A professional grade scan tool reads stored trouble codes,pending trouble codes, looks at live sensor data so you can look at a sensors performance and output signals without having to do intensive testing at each sensor, (cheaper scan tools have limited capabilities and may only read the trouble code stored). As with most things automotive its best to check the basics first, check for vacuum leaks, fuel pressure and delivery volume. Verify engine mechanical integrity before looking for complex problems check that the basics are sound. The window motor or switch may be failing but diagnostic tests need to be done before jumping to conclusion.