Replaced PCM from one from wrecker from wrecker can security system be disabled

2004 CHRYSLER PT CRUISER

16,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC

TRACEYTRUCKING

MEMBER
3 POSTS

I put in a new fuel injector and new connector and replaced wire from connector to PCM then replaced the PCM with PCM from wrecker from same year
and model. I started car it ran for about sixty seconds then stopped. When I turned the key to the on position all the dash lights came on and slowly when out but the security light come back on which would not let the starter turn. Then I put the old PCM back in and the car started and would not idle smooth. Same p0204. Can I disable the security system myself?

Oct 22, 2018 at 4:37 PM

TRACEYTRUCKING

MEMBER
3 POSTS

Code p0204.

Oct 23, 2018 at 7:50 AM (Merged)

STRAILER

✓Experienced Mechanic
55,616 POSTS

Yes you can but this code is for the #4 fuel injector circuit problem. Have you replace the injector and checked the connector? If not here is a guide to help you get started:

https://www.2carpros.com/articles/how-to-replace-a-fuel-injector

Please run down this guide and report back.

Cheers, Ken

Oct 23, 2018 at 7:51 AM (Merged)

TRACEYTRUCKING

MEMBER
3 POSTS

I replaced the injector and connector plus the wire from the connector to the PCM.

Oct 23, 2018 at 7:51 AM (Merged)

STRAILER

✓Experienced Mechanic
55,616 POSTS

I would check the remained of the injectors because they can have an effect on the system giving codes. Here is a guide to help.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

If okay let's do a pin to pin from the injector to the PCM

https://www.2carpros.com/articles/how-to-check-wiring

Here are the engine wiring diagrams so you can see how the system works. Check out the diagrams (Below). Please let us know what happens.

Images (Click to enlarge)