Honda Civic 2002-2003 Service Manual page 294

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6. Substitute a known-good AlF sensor (Sensor 11 and
recheck.
Is OTe PI159 indicated?
YES~Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-61. if the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
NO~Replace
the AlF sensor (Sensor
11 .•
11-87