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Test results |
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Oxygen sensor wiring |
Check for the presence of short circuit to Vbatt |
Go to Step 2 |
Presence of short circuit to Vbatt. |
Restore correct insulation to battery positive |
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Oxygen sensor wiring |
Check for short circuits to earth |
Go to Step 3 |
Presence of short circuit to earth |
Restore correct insulation to earth |
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Oxygen sensor wiring |
Check for an open circuit |
Go to Step 4 |
Presence of open circuit |
Restore the correct wiring |
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Oxygen sensor |
Check that the oxygen sensor is working correctly by carrying out the See Test 1080BA CHECK ON OPERATION OF UPSTREAM LAMBDA SENSOR |
End of diagnosis |
Oxygen sensor defective |
Replace the oxygen sensor Op. 1080B90 |