Code P1684 on a PT Cruiser typically indicates a problem with the battery or the battery's voltage system, often related to a low battery or a disconnected battery terminal. To fix this issue, check the battery connections for corrosion or looseness, and ensure they are tight. If the connections are fine, test the battery's voltage and charge it if necessary. If the battery is old or faulty, consider replacing it.
P0303, cylinder #3 misfire. Check plug, wire, coil, etc.
P1684 , battery was disconnected in the last fifety starts. Not usually a code that is a problem.P0601, pcm internal failure. The engine computer needs replaced.P1684 , battery was disconnected in the last fifety starts. Not usually a code that is a problem.P0601, pcm internal failure. The engine computer needs replaced.
It is a speed sensor code.
P1776, solenoid switch valve latched in low/reverse position. The usual cause is dirt in the transmission valve body.
It is catalyst efficiency warm up failure bank two. The problem is a PT Cruiser only has one bank.
high voltage at the tps.
Did you ever have a coolant leak?
Cylinder #1 misfire.
evap leak
You can find a good PT Cruiser Engine online or through your a PT Cruiser dealership.
A PT Cruiser does not have a reset button.
Chrysler manufactures the PT Cruiser