Flashing check engine light...

Carramrod

New member

• Mar 31, 2017

• #1

Yes I know it means a miss fire but I'm not throwing any codes....from the research I've done I already ordered 2 new camshaft position sensor. I have changed all the spark plugs and coil packs aswell. Gonna inspect the injectors soon...its a 14 rubicon so idk why it's happening so soon

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catahoula

Caught the Bug

• Mar 31, 2017

• #2

I have been told if light stays on you are fine to drive. If it flashes you do not want too.

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Carramrod

New member

• Mar 31, 2017

• #3

catahoula said:

I have been told if light stays on you are fine to drive. If it flashes you do not want too.

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Click to expand...

But what couod it be?...

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Judesign

Caught the Bug

• Mar 31, 2017

• #4

If the check engine light is flashing it's got codes. Probably misfires detected. But hopefully you can get some direction. Do you have a scanner?

 

WJCO

Meme King

• Mar 31, 2017

• #5

A flashing light means that the issue is risking damaging the catalytic converter due to excessive unburned fuel entering the exhaust. You shouldn't be driving it. And there should be codes.

 

catahoula

Caught the Bug

• Mar 31, 2017

• #6

Unfortunately, you might have to take to dealer if you cannot find anything with your scanner.

 

Carramrod

New member

• Mar 31, 2017

• #7

Yeah I have a scanner...it showed the p0300 which is the misfire but it doesn't pinpoint which cylinder..my scanner is basic so I'm gonna go get a legit one here soon to trouble shoot it...ive seen a lot of these issues fixed with the crank and camshaft sensors replaced...im gonna try that since it's a cheap repair

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sipafz

Caught the Bug

• Mar 31, 2017

• #8

Carramrod said:

Yeah I have a scanner...it showed the p0300 which is the misfire but it doesn't pinpoint which cylinder..my scanner is basic so I'm gonna go get a legit one here soon to trouble shoot it...ive seen a lot of these issues fixed with the crank and camshaft sensors replaced...im gonna try that since it's a cheap repair

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Click to expand...

Did you try getting codes from the dash without your reader? I believe that P0300 means miss fire on multiple cylinders.

 

Carramrod

New member

• Mar 31, 2017

• #9

It does..i tried and nothing now...zero codes with the flashing engine check light...and she's hesitates to start..

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PHX JK

Member

• Apr 1, 2017

• #10

P0300

P0300 is also set before the ECM establishes which cylinder is misfiring. Once the Miss is more consistant then ECM can determine the cylinder with P0301to P0306.
Flashing Eng light is bad news, yes it's hard on the Cat to drive with a flashing light.
PHX