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Mazda Truck
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2003
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B2300 2WD L4-2.3L VIN D
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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U Code Charts
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U1039
U1039
U1039 Data Circuit
Condition - Invalid or missing data for vehicle speed
Diagnosis By Symptom - Module Communication