Ck engine light on have codes help!

A

asatxj

NAXJA Forum User

Location

Grant, Michigan

• Dec 3, 2003

• #1

My ck engine light came on. I pulled codes when I got home
11,12,13,14,15
Engine runs fine, temp is normal, Oil PSI is ok Oil/filter changed last week,level is fine. The only thing I noticed was the alt gauge was a bit high (like 15 v.) after it came on. Any suggestions.
BTW Alt was tested 30 days ago and was fine.
TIA

 

Kejtar

PostMaster General

NAXJA Member

Location

Westminster, SoCal

• Dec 3, 2003

• #2

http://go.jeep-xj.info/HowtoECUcodes.htm

 

A

asatxj

NAXJA Forum User

Location

Grant, Michigan

• Dec 4, 2003

• #3

By the sounds of things my MAP sensor is dead/dying. What's the test procedure? My FSM is at school. I may pick up another one at the local boneyard and see what happens. It's a tad sluggish but tolerable for the next day.
thanks!

 

C

ChiXJeff

Curmudgeon

NAXJA Member

Location

SE MN

• Dec 4, 2003

• #4

Uh, why would you pick up a sensor at the boneyard?

Autozone lists them for $33.99 (94 XJ.)

 

A

asatxj

NAXJA Forum User

Location

Grant, Michigan

• Dec 4, 2003

• #5

They'll give it to me and if it solves the problem I'm good for a while as my vehicle maintenance fund is rather depleted due to holiday shopping. I will get a new one after I get the wiper switch installed.
BTW after checking the codes and letting it relax until morning the idiot light didn't come on during the morning commute.

 

M

MudSlinger

NAXJA Forum User

Location

Fresno,CA

• Dec 20, 2003

• #6

See if this RULE help you.

As vacuum increases, resistance increases and voltage decreases.
So if you applied vacuum the voltage should drop from 5 to 1 volt.


Hope this helps