Engine light stays on and engine idles rough
Generator field not switching properly.P0622
Internal powertrain control module fault condition detected (failed memory check ) p0601.
Sounds like its time to replace ecu pcm. But try resetting it first. Remove negative battery cable and turn key all the ay for 1 min. Then pull positive off and touch the negative cable with positive cable and hold for 5 seconds. Make sure they are not touch battery terminals at all. Good luck
SOURCE: car rides rough
According to what i find the PCM Read only memory has a problem that is the main computer, that is most likely your problem
SOURCE: 2001 Dodge Dakota Engine Light
below is coped directly from Chrysler. sorry but if you have that code you need a PCM
Symptom:
P0601-PCM INTERNAL CONTROLLER FAILURE
POSSIBLE CAUSES
POWERTRAIN CONTROL MODULE
TEST ACTION APPLICABILITY
1 NOTE: This DTC indicates an internal PCM problem.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accordance
with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
38
COMMUNICATION
SOURCE: rough idle, backfire on acceleration
check everything you can under the hood your air intake system all of it especially make sure all clamps are tight .. and make sure all vacuum hoses are good and not cracking or broken or just loose . you might run a little fuel cleaner through a tank of gas too cleaning the engine fuel system up some. just a few ideas.. Jerry
SOURCE: need to know what p0622 and p2503 diagnostic codes
Sounds more like an alternator problem. Check output voltage of alternator, code P2503 indicates low voltage. Check/clean all connections at battery and alternator, as well as check all fuses/relays under hood in fuse relay box, just in case fuse blown as well. If all checks out good, you may need a new alternator.
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