How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan, Technician
Category: Jeep
Satisfied Customers: 23481
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Type Your Jeep Question Here...
Dan is online now
A new question is answered every 9 seconds

Check engine light, code 304 and 2311, replaced coil,

Customer Question

check engine light, code 304 and 2311, replaced coil, checked wires no help, thinking PCM computer
JA: Does the light stay on, or does it blink?
Customer: both,
JA: What is the make/model/year of your car?
Customer: 2006 liberty sport 3.6 engine
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: will fix myself, switch spark plug and coil, also checked wires with meyer, all look ok
JA: Anything else you think the mechanic should know?
Customer: engine was running great happened all at once, also cleared trouble codes and disconnected battery to reset PCM
Submitted: 3 months ago.
Category: Jeep
Expert:  Dan replied 3 months ago.

Hello, my name is***** agree the PCM is the cause if you replaced coil/plug. Next step is to check resistance on wiring between PCM and coil, if good replace the PCM. There is also a reflash available which you may want to try first. Here is a wiring diagram to help with testing, let me know if you have more questions. Thanks.



Related Jeep Questions