Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 843
DME 7.8 DME 7.8 0 · 0-144.1P1250
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DME 7.8 DME 7.8 0
0-144.1P1250
Boost Pressure Control Deviation - Above Limit
Diagnosis conditions
• Boost pressure control active (operating condition close to full
load)
• No faults in mixture adapation, pressure sensor, ambient pres-
sure sensor, frequency valve
Possible fault cause
♦Bypass flaps incorrectly adjusted
♦Turbocharger faulty
Affected terminals
-
Diagnosis/Troubleshooting
Work instruction Display OK If not OK
1 Check adjustment of Adjust bypass flaps
bypass flaps
2 Check whether turbo- Replace the turbo-
charger compressor shaft charger
can rotate freely
2102 P1250 0-144.1 page 1
Printed in Germany – 6, 2002 p1250
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