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Getting three codes P0203,P0122 and P1478 is one causing all three or are they seperate issues.
Vehicle: 2001 Dodge Caravan V-6

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P0203 Fuel injector cylinder number 3

P0122 Throttle position sensor voltage low

P1478 Cooling fan driver fault

These would all be separate issue, The one code that stand out is P1478 as this vehicle  uses a cooling fan relay, P1478 for this type of vehicle may be invalid.

 Here a fuel injector on a Dodge , this connection was not properly connected, as the locking tabs where broken just fixing the connection corrected this injector code.

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