I have a 99 TJ with the engine light on. I tried the on/off with the key,
but get no error codes showing up. Any hints?

I believe it is the O2 sensor as I ran it with the exhaust hanging off
before the primary (upstream) O2 sensor.

Anyway --- how else can I get the codes without buying the diagnostic tool
or heading to a mechanic with one?

BillM

 

Sorry but without a diagnostic scan tool, you can't get the codes off your
'99 TJ. There are a few years where they made the codes inaccessable and
'99 is one of them.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.***.net/jerrypb/

"Morrissey" <morrissey@roadrunner.nf.net> wrote in message
news:bs47ak$m1k$1@nntp-stjh-01-01.rogers.nf.net...
> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic
tool
> or heading to a mechanic with one?
>
> BillM
>
>

 

Sorry but without a diagnostic scan tool, you can't get the codes off your
'99 TJ. There are a few years where they made the codes inaccessable and
'99 is one of them.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.***.net/jerrypb/

"Morrissey" <morrissey@roadrunner.nf.net> wrote in message
news:bs47ak$m1k$1@nntp-stjh-01-01.rogers.nf.net...
> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic
tool
> or heading to a mechanic with one?
>
> BillM
>
>

 

Sorry but without a diagnostic scan tool, you can't get the codes off your
'99 TJ. There are a few years where they made the codes inaccessable and
'99 is one of them.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.***.net/jerrypb/

"Morrissey" <morrissey@roadrunner.nf.net> wrote in message
news:bs47ak$m1k$1@nntp-stjh-01-01.rogers.nf.net...
> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic
tool
> or heading to a mechanic with one?
>
> BillM
>
>

 

Hi Bill,
Give it another try, only this time give enough time to make it's
diagnosis. Some digital panels need the trip odometer cleared and read
from there: http://www.allpar.com/fix/codes.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Morrissey wrote:
>
> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic tool
> or heading to a mechanic with one?
>
> BillM

 

Hi Bill,
Give it another try, only this time give enough time to make it's
diagnosis. Some digital panels need the trip odometer cleared and read
from there: http://www.allpar.com/fix/codes.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Morrissey wrote:
>
> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic tool
> or heading to a mechanic with one?
>
> BillM

 

Hi Bill,
Give it another try, only this time give enough time to make it's
diagnosis. Some digital panels need the trip odometer cleared and read
from there: http://www.allpar.com/fix/codes.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Morrissey wrote:
>
> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic tool
> or heading to a mechanic with one?
>
> BillM

 

99 was a year that was not allowed access without a scan tool

Morrissey wrote:

> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic tool
> or heading to a mechanic with one?
>
> BillM

 

99 was a year that was not allowed access without a scan tool

Morrissey wrote:

> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic tool
> or heading to a mechanic with one?
>
> BillM

 

99 was a year that was not allowed access without a scan tool

Morrissey wrote:

> I have a 99 TJ with the engine light on. I tried the on/off with the key,
> but get no error codes showing up. Any hints?
>
> I believe it is the O2 sensor as I ran it with the exhaust hanging off
> before the primary (upstream) O2 sensor.
>
> Anyway --- how else can I get the codes without buying the diagnostic tool
> or heading to a mechanic with one?
>
> BillM