R.J.Magellan

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Question Asked: Keep getting code 42 on KOER test. Changed o-2 sensor. Shows always rich.
October 13, 2013, 03:37 PM
Trucks been non-op past 6 or so years. Tried inj. cleaner. Checked connectors. Generally seems to run o.k. but still sometimes gets a dirty inj. Don't have a emissions manual or breakout box. Any way to check o-2 sensor with ohm meter?
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