20 Most Recent 2008 Chrysler Pt Cruiser - Page 7 Questions & Answers

Some of the possible causes for the P0420 check engine light to become lit include the oxygen (O2) sensor not working correctly, a damaged or leaking exhuast (pipe, manifold, catalytic converter) or a damaged catalytic converter. ----------------------------------------------------------------------------------super vag k+can

HelloWhen the service engine soon light a yellow light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Get the code PT cruiser has problems with P0128,If you have that code you will need to get a ECM reflash to correct the condition

You should be able to reset the service light by turning the key to the "run" position (do not start vehicle) and then immediately push down on the gas pedal to the floor 3 consecutive times and then start the vehicle... this should reset the service reminder light. when you push the gas pedal 3 times it must be done consecutively within about 15 - 20 seconds. Hope this helps...

The click sound would be the air conditioner compressor engaging, the engine will slow down do to the additional load. If it idles rough you probably need to think about cleaning the throttle body.

You must have the dealer scan the computer controlled dash display to see what the problem is.

what you havent posted in this question is some important information like is it a manual or a automatic transmission version of this vehicle

sounds to me like you might have a bad ground. had the same problem with one of my cars and i found that my ground broke. rewired the ground and it work great

short in the switch or relay......hope this info helps....

Check to see if the valve stem has been properly fitted to the rim,I see this happen all the time on a lot of cars, if the valve stem is improperly mounted it would cause the air to leak out hence you said it goes from 30 to 20 in a matter of minutes..have them all check just to make sure..if your rims are badly rusted which I don't think they could be on a 2008 but if they are that could also be a big problem, easy as switching the tires to different rims could be the solution..have them also check wear patterns to make sure the weight of the car isn't puttin pressure on a potential defect in the stem :) hope this helps..

STICKING THERMOSTAT OR WATER LEAK

thats tire pressure its a sensor that reads your pressure and once you get low it light the dash indicator (yellow exclamation point) and if you check the pressure yourself with a tire gauge and it reads fine then you have a bad sensor.