2004 pt cruiser, code p0339, runs rough and no power,only happens when fan is turned on inside vehicle

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Thoroughly clean the Throttle Body and Idle Air Control. Classic causes of 'rough idle'.

https://www.google.com/search?q=2004+chrysler+%22pt+cruiser%22+P0172

Idle Air Control Valve on 04 PT Cruiser??? Where is it??? ...

RepairPal.com https://repairpal.com > ... > PT Cruiser > 2004
Aug 23, 2010 - I want to clean my IAC, but can't figure out where it is exactly. On another website (PT Forum) there is a pic, ... 2004 Chrysler PT Cruiser.

1 answer · Top answer: Sorry, cannot insert photos here. The IAC is mounted on the throttle body
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Crankshaft Position Sensor

https://www.google.com/search?q=2005+Chrysler+PT+Cruiser+2.4+Turbo+GT.+code+P0339

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Car overheats Chrysler Vehicles Ricks Free Auto Repair Advice

you would need to do a running test. but if its worse with new injector. then it can be the dispack fault. it feeds the spark plugs. have seen some were the unit has leaked. and made like a cement on the shaft that is the inside of it come out and dropped down the shaft. also the rubber will go white like water marks. check them to make sure they are the same if it does look like what ive said change it. they are not dear to replace.

Inspect pugs for propper gap, cracks... check wires for arching and replace as needed. Verify firering order is correct.

Does the vehicle turn off, run rough, or hesitate?

It sounds as though you have a faulty Idle Air Control Valve".

Check on intake silicon gaskets, upper and lower. About $18 at autozone

Do you have one or two fans on the radiator? Most vehicle's with a/c have two fans. One of the fans will only come on when the a/c is on.

there is only one bank on a pt cruiser and yes it could be a fuel pump or a vacuum leak

Good place to start, but If you check directly with Chrysler there may be a technical service bulletin, that isn't posted yet. Have the codes cleared when work done, and see what happens.