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Wrangler: My check engine light just started flashing and beeping…

Customer Question
My check engine light just...
My check engine light just started flashing and beeping on my 2007 wrangler Sahara. It is also running rough and seems like reverse and 2nd gear are the worst.
Submitted: 2 years ago.Category: Jeep
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Answered in 20 minutes by:
6/2/2015
Jeep Mechanic: Chris, Shop Foreman replied 2 years ago
Chris
Chris, Shop Foreman
Category: Jeep
Satisfied Customers: 14,667
Experience: Jeep Certified Master Tech
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Hello, my name is***** you for allowing me to assist you! A flashing check engine light means that the PCM (engine computer) is detecting a cylinder misfire. Tell me when was the last time you had a tune up? (spark plugs, wires, etc.)..
Chris
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Customer reply replied 2 years ago
About a year ago.
Customer reply replied 2 years ago
I just hit 100000 miles
Jeep Mechanic: Chris, Shop Foreman replied 2 years ago
Did you have the wires replaced also at that time?
Chris
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Customer reply replied 2 years ago
I don't think so
Jeep Mechanic: Chris, Shop Foreman replied 2 years ago
Ok, well something is causing the misfire. Usually it is a spark plug, but can be the plug wires. The other things it may be is a bad fuel injector or an engine mechanical problem like a burnt valve. But what you need to do is to have a shop check the wires and replace them if they are questionable. If they are ok, then have a compression test done to verify that the engine is sound. If it is, then the problem has to be 1 bad spark plug(s) 2 bad plug wires, or 3 a bad fuel injector. I hope this information helps, and please let me know if you need further assistance with this.
Chris
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Chris
Chris
Chris, Shop Foreman
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