Originally Posted by lanham
I am working on a Chrysler PT cruiser .The car runs fine when the computer is reset and the service light is off but when the service light comes on it won't rev past 2500 and acts like it hitting the rev limiter.Turn the service light off and it runs fine again.It is showing these codes P0016- Cam Sensor, P0113-IAT sensor, P0344-Cam position sensor, P0108-Map sensor.The cam position sensor has been replaced but is still showing up.Do you think it could be one of these sensors or would the computer be bad? Where should i start? This is a 2004 model with the 2.4 engine.I forgot to mention the car idles fine.
First your gonna need someone with a scanner(with live data) to verify signal output voltage to the IAT,MAP CAM...All the codes combine indicate a possible short in the wiring.The output of the IAT is prob above 4.9 volts thus setting the code.The map and cam rely on a 5 volt "input" to work "function" with a signal voltage up to 4.9 volts. If theres a short to battery voltage(input side of sensors,or loss of ground,(above 5.0 volts) can cause these codes and go into a limp in mode.