Please ask a new question about a specific code. Other wise see link below.
You need a scan tool.
There is no cabin filter on a 2004 Dodge Dakota.
80w90
Trouble code P0546 means:Exhaust gas temperature sensor circuit high (bank 1)
Trouble code P0499 means: Evaporative Emission System Vent Control Circuit High
it is located in the pan
Yes
YesYes
It doesn't have one.
Is a 2wd Dakota truck flat towable
Cycle the key to the ON position, then to OFF, then to ON, then to OFF then to ON and leave it there. Where the miles are normally displayed a letter P and a set of numbers will come up. EX: P0303. Once it says DONE it is done displaying the codes. When you have the code(s) use google to look them up. "2004 Dodge Neon trouble codes".
in the gas tank