| Location of the exhaust warning lamp: |
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| The exhaust warning lamp can flash or stay lit. In either case consult the fault memory → Chapter. |
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| The warning lamp flashes: There is a fault that may damage the catalyst if the vehicle continues being driven in the same way. In this event the vehicle should only be driven at low output. |
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| The warning lamp stays lit: There is a fault that may degrade the composition of exhaust emissions. Consult the engine fault memories. |
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| If there is a fault in vehicle driving performance or a complaint from the customer and the exhaust warning lamp does not light up, consult the fault memory: there could be stored in the memory a type of fault that does not light up the warning lamp instantaneously. |
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| Switch on the ignition: The exhaust warning lamp should light up. |
| If the exhaust warning lamp does not light up with the ignition on: |
| If the exhaust warning lamp lights up with the ignition on: |
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| Start the engine and let it idle: The exhaust warning lamp should switch off after a few seconds. |
| If the exhaust warning lamp does not switch off: |
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| Consult the fault memory; eliminate any faults and clear the memory → Chapter. |
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