Trouble code P0401 means: Exhaust gas recirculation - insufficient flow detected
What does obd code P0740 mean
egr, low flow problem.clean out egr and tube, of carbon.
plug a obd 2 code reader into your car and activate it.
OBD I, but for the most part, you can use OBD II
OBD code P0304 is Cylinder Four Misfire.
Obd-on board diagnostic. The port is the plug the scan tool or code reader connects to.
J1850 is not a trouble code. It is a protocol that the OBD-II system uses. Trouble codes will be represented by a P before the numbers
OBD I code 67 - Neutral Drive Switch Circuit Open ( key on , engine off )
OBD code P1127 mean Exhaust not warm enough.
Cylinder #1 misfire.
Replace the leading 0 with 61, so for example 0401 555 555 becomes 61401 555 555
0401