As a Dodge code it refers to..
P1491 Secondary Switch Solenoid Circuit Malfunction.
"P1491 is for the cooling fan relay circuit. There is a seperate fan for the a/c condensor on your truck. When this code sets it is because the fuse is blown. Its fuse 39 in the box under the hood. The cause of this fuse blowing is a bad fan motor."
SOURCE: 2001 grand caravan
the code p1491 is a bad radiator fan control relay.
Code p0403 is an egr valve circuit malfunction.Probably the egr solenoid, have it checked.
SOURCE: I took my 99 dodge grand caravan to advanced auto
P1491 is Radiator Fan Control Relay Circuit. MEANING: An open or shorted condition detected in the low speed radiator fan control circuit.
Some questions for you:
1. Is your Caravan overheating?
2. Is your Caravan water temperature spiking going past the midway point on the Temp Gauge before the radiator is engaged?
3. Is your Rad Fan coming-on and then turning off and back-on in a very short period of time (like under a minute?
If all of these are "No" then do not worry about it.
SOURCE: firing order of 2003 dodge grand caravan
For the 2003 Dodge Caravan (and Grand Caravan) ALL 3.3L V6 Engines (including the Flex Fuel): Also for 3.8L V6 Engines:
Firing Order:
1-2-3-4-5-6
Cylinders:
........(back).......
|...1....3....5...|
______________
|...2....4....6...|
Ignition Coil:
.......(back)
electrical connection
...........|
..........V
5........1........3
2........4........6
.......(front)
Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!
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