Help me reading the codes guys
Thread Starter
Seasoned Member
Joined: May 2009
Posts: 339
Likes: 4
Year: 1996
Model: Cherokee
Engine: 4.0L
"CF Moderator"
Joined: Sep 2008
Posts: 3,045
Likes: 3
From: N.J. Shore Area
Year: 1994
Model: Cherokee
Engine: l6 HO
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
This gives the codes. http://jeephorizons.com/phpbb/viewtopic.php?t=2719
Your underhood emission sticker, and the tire placard in the door jamb will have the date of manufacture. So will the title by the way.
Your underhood emission sticker, and the tire placard in the door jamb will have the date of manufacture. So will the title by the way.
Last edited by ol"blue; May 28, 2009 at 11:27 AM.
Thread Starter
Seasoned Member
Joined: May 2009
Posts: 339
Likes: 4
Year: 1996
Model: Cherokee
Engine: 4.0L
TJ: So, I've got the codes correct?
And oh, is that the link you were finding?
And also, why two same codes? 21.. 21?
Yeah, but there is no underhood emission sticker / details.. and the no placard in the door jamb either.. seems like the PO was on to something..
And Blue, the link you gave doesn't really match my codes.. for example, the code 45, its related to something TURBO, lol... nor do the obd II codes match..
You check the codes and see if I have got them right..?
And oh, is that the link you were finding?
And also, why two same codes? 21.. 21?
Yeah, but there is no underhood emission sticker / details.. and the no placard in the door jamb either.. seems like the PO was on to something..
And Blue, the link you gave doesn't really match my codes.. for example, the code 45, its related to something TURBO, lol... nor do the obd II codes match..
You check the codes and see if I have got them right..?
Last edited by syncview; May 28, 2009 at 11:49 AM.
"CF Moderator"
Joined: Sep 2008
Posts: 3,045
Likes: 3
From: N.J. Shore Area
Year: 1994
Model: Cherokee
Engine: l6 HO
This gives the codes. http://jeephorizons.com/phpbb/viewtopic.php?t=2719
Your underhood emission sticker, and the tire placard in the door jamb will have the date of manufacture. So will the title by the way.
Your underhood emission sticker, and the tire placard in the door jamb will have the date of manufacture. So will the title by the way.

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CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
TJ: So, I've got the codes correct?
And oh, is that the link you were finding?
And also, why two same codes? 21.. 21?
Yeah, but there is underhood emission sticker / details.. and the no placard in the door jamb either.. seems like the PO was on to something..
And Blue, the link you gave doesn't really match my codes.. for example, the code 45, its related to something TURBO, lol... nor do the obd II codes match..
You check the codes and see if I have got them right..?
And oh, is that the link you were finding?
And also, why two same codes? 21.. 21?
Yeah, but there is underhood emission sticker / details.. and the no placard in the door jamb either.. seems like the PO was on to something..
And Blue, the link you gave doesn't really match my codes.. for example, the code 45, its related to something TURBO, lol... nor do the obd II codes match..
You check the codes and see if I have got them right..?
I don't know what's up with that.Last edited by ol"blue; May 28, 2009 at 11:59 AM.
Thread Starter
Seasoned Member
Joined: May 2009
Posts: 339
Likes: 4
Year: 1996
Model: Cherokee
Engine: 4.0L
Hmm, are you sure that battery over voltage is related to me?
And what should I check / diagnose to rectify this problem?
And what should I check / diagnose to rectify this problem?
Last edited by syncview; May 28, 2009 at 12:18 PM.
CF Veteran
Joined: Nov 2008
Posts: 2,473
Likes: 9
From: Paso Robles Ca
Year: 1991
Model: Cherokee
Engine: 4.0
45
Trans temperature/ Governor pressure voltage out of range. Less than 1.55 or above 3.73volts for temperature and less than .1 or above 4.89 volts. Trans temp. to high or low. OD switch input too low for more than 5 mins.
21
o2 sensor voltage
I think you have 2 os sensors
they are all votage faults
start with the charging system
code
46 Battery over voltage. could be the cause of all the other codes
get that fixed first
Trans temperature/ Governor pressure voltage out of range. Less than 1.55 or above 3.73volts for temperature and less than .1 or above 4.89 volts. Trans temp. to high or low. OD switch input too low for more than 5 mins.
21
o2 sensor voltage
I think you have 2 os sensors
they are all votage faults
start with the charging system
code
46 Battery over voltage. could be the cause of all the other codes
get that fixed first
CF Veteran
Joined: Nov 2008
Posts: 2,473
Likes: 9
From: Paso Robles Ca
Year: 1991
Model: Cherokee
Engine: 4.0
Thread Starter
Seasoned Member
Joined: May 2009
Posts: 339
Likes: 4
Year: 1996
Model: Cherokee
Engine: 4.0L
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
45
Trans temperature/ Governor pressure voltage out of range. Less than 1.55 or above 3.73volts for temperature and less than .1 or above 4.89 volts. Trans temp. to high or low. OD switch input too low for more than 5 mins.
21
o2 sensor voltage
I think you have 2 os sensors
they are all votage faults
start with the charging system
code
46 Battery over voltage. could be the cause of all the other codes
get that fixed first
Trans temperature/ Governor pressure voltage out of range. Less than 1.55 or above 3.73volts for temperature and less than .1 or above 4.89 volts. Trans temp. to high or low. OD switch input too low for more than 5 mins.
21
o2 sensor voltage
I think you have 2 os sensors
they are all votage faults
start with the charging system
code
46 Battery over voltage. could be the cause of all the other codes
get that fixed first




