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Mazda
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2005
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6 L4-2.3L
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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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U0100
U0100
U0100 - Communication error to PCM
Output module:
TCM
EHPAS control module
Instrument cluster
For further information regarding this DTC
Reading and Clearing Diagnostic Trouble Codes