Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 789
DME 7.8 DME 7.8 0 · 0-122.8P1146
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DME 7.8 DME 7.8 0
0-122.8P1146
Oxygen Sensor Ahead of TWC, Bank 1 – Open Circuit
Diagnosis conditions
• Vehicle at operating temperature, after this 3 minutes idle
speed, then approx. 30 seconds increased idle speed.
Possible fault cause
♦Oxygen sensors (heating connection)
Affected terminals
-
Diagnosis/Troubleshooting
Note!
Do not use contact spray on the connectors to oxygen sensor.
Work instruction Display OK If not OK
1 Replace oxygen sensor
Note!
Do not exchange oxygen sensors ahead of catalytic converter and
after catalytic converter.
2469 P1146 0-122.8 page 1
Printed in Germany – 6, 2002 p1146
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