I have the same problem, and I followed the advice of turning the ignition on x2 on 2002 Chrysler PT Cruiser

but no code pops up. Engine light does come on

by in Atlanta, GA on April 02, 2013
3 answers 2 comments
ANSWER by on April 02, 2013
Reqires the use of a code reader or scanner to retrive fault codes.
COMMENT by on April 02, 2013
Thanks.
ANSWER by on April 02, 2013
scan codes with a scanner and post so we can adv
ANSWER by on April 02, 2013
ON-OFF-ON-OFF-ON........(3X) third time leave in 'run' position and watch LED display for 'fast' codes. NOT a substitute for a good scanner and proper diagnostics though. Must cycle key through sequence within 5 seconds or so , I believe.
COMMENT by on April 02, 2013
Thought it was twice; I'll try that. P 1684, and P 301 Looks like 301 is Cylinder 1, and 1684 has the battery disconnected in the last 50 start-ups. Now to find which is cylinder one. I went 215 thousand miles on the first set of plugs; 15 on these