Check engine light blinking and beeping - 2010 Jeep Liberty

check and test relays you really dont hear an immobilizer kicking out most likely a relay overheating --also scan vehicle for code[s]

Flashing check engine light CarMD
Flashing check engine light CarMD
Blinking Engine Light Means NOW

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lost the operators guide, ?
it answers that.!
all OBD2 cars from 1996 do that, not beep , the blink
it means you are burning up your CAT converters.
when the EFI system goes hey wire, (means lost control of fueling or spark) it goes rich, and rich burns up cats.
the flashing means, get cars serviced NOW.
so you dont need $1000 parts.

here it is, if lost
posted 100 + times.
100% free
http://www.jeep.com/en/owners/manuals/

RTM it there.
or get it serviced like the 99% do.
or if 1% ,scan it next.
the tool is cheap,

Can you scan it for codes and post the code numbers ? Thanks

Sound sleek you have two problems. Check your brake fluid level immediately for the beeping and brake light on!
The check engine light is a completely different story.
I recommend you take it to a shop.

I would not disconnect it, it saved my engine more than once (although the sensor itself was the leaking culprit). its right in front and fairly easy to get to. Get a new one at parts store or junkyard and replace it.It is located right to the left of the distributor. pull boot back and remove push on connector. Remove sensor with wrench.

Try doing this: push the brake pedal, turn the ign key from off to on five times, this should reset the system.

It blinks and beeps if the oil pressure is dangerously low , which could severely damage your engine. Hopefully it is just a faulty oil pressure sender unit. That is an inexpensive sensor that "measures" the oil pressure. Best case , engine fine , oil pres good , just a bad sensor.

You need to have it scanned for codes. The flashing overdrive light means it has trouble codes that pertain to the transmission.