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Emission Failures - High CO & low lamna reading.  common causes of rich running faults are the lamna sensor or the ECU (engine control unit) both of these parts are relatively simple to check, to check the sensor strip back the insulation on the signal wire from the lamna sensor, this wire is usually black. Then hold the bare wire between your finger and thumb then touch your other hand on to the battery positive the internal resistance of your body will give 1volt at your finger tips which is what the sensor would give out when the engine runs rich, if the emissions come down then you have a faulty lamnda sensor or wiring but if the emissions remain the same then the ECU is a possible fault. For more information on ECU testing click on ECU |
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Honda, all models 1993 - 2004 onwards
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High CO with normal lamnda reading. If the oxygen level is below 1% then a high CO with a normal lamna reading can only be one thing - the catalytic converter, when ever you get this reading the catalyst should be condemed. But always make sure you check the oxygen level first, if its high (over 1% at speed) then you've got a leaking exhaust or engine runing problems Crash-Data.co.uk reset and repair Honda airbag modules after the airbags have been deployed or the seatbelts have gone off - |