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Porsche
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2001
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911 Carrera 4 Cabriolet (996) F6-3.4L
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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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P Code Charts
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P1508
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DME 7.8
DME 7.8
P1508
408 Torque comparison function monitor - signal implausible
Diagnosis conditions
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Engine speed greater than 1,120 rpm
Possible fault cause
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DME control module faulty
Diagnosis/troubleshooting