Fault handling, (I) catalyst damaging misfiring
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Fault handling, (I) catalyst damaging misfiring
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The driver is warned immediately when catalyst damaging misfiring occurs by the CHECK ENGINE lamp flashing at 1 Hz, irrespective of whether the lamp was previously on or not. A diagnostic trouble code will be generated at the same time. A special code will also be generated if the fuel level in the tank is below 10 litres to facilitate fault diagnosis.
For the CHECK ENGINE lamp to go out without any other measures being taken requires 3 consecutive driving cycles under similar operating conditions as when the fault first occurred without the catalyst damaging misfiring returning.
For the diagnostic trouble code and the low fuel level code, if generated, to be cleared requires a further 40 fault-free warming-up cycles.
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1.
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Fault criteria for catalyst damaging misfiring fulfilled
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2.
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CHECK ENGINE lamp flashing at 1 Hz, diagnostic trouble code generated. A code will also be generated if the fuel level is low.
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3.
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Catalyst damaging misfiring ceases
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4.
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CHECK ENGINE lamp goes on continuously
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5.
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Catalyst damaging misfiring does not occur for 3 consecutive driving cycles under similar operating conditions as when the fault first occurred
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6.
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CHECK ENGINE lamp goes out
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8.
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Catalyst damaging misfiring does not occur for 40 warming-up cycles
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9.
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Diagnostic trouble code cleared
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