6???? the code should be like this ie: P0301. Please reask question with the code number..
Diagnostic code 43 in the 1997 Jeep Grand Cherokee refers to an issue with the distributor. This often causes the Jeep to stall at operating temperature.
catalytic converter circuit
Map sensor voltage low.
under the dash right hand side.
With a scan tool, or unhooking the battery.
55 is end of message. If that is the only code you have, then there isn't a problem
P0783: 3-4 shift malfunction
Diagnostic Code 12 on a 1995 Grand Cherokee just means that your battery has been dead or disconnected within the last 50 ignition cycles.
Engine speed sensor circuit malfuntion
Mostly square and blackMostly square and black
The diagnostic code 12 51 55 is actually not a code for the 1994 Jeep Grand Cherokee Laredo. The 12 means that it has started searching for codes. The 51 is oxygen sensor stuck lean. The 55 means it is finished searching for codes. Getting this means nothing is wrong.
The 2000 Jeep Cherokee OBD 2 port is on rear of lower left edge of dash