| Location of exhaust gas warning lamp. |
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| The exhaust gas warning lamp may flash or stay on. In either case consult the fault memory → Chapter. |
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| The warning lamp flashes: There is a fault that under current driving conditions could damage the catalyst. In this case only drive at very low engine revs. |
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| The warning lamp remains on: there is a fault that may affect negatively the composition of exhaust emissions. Interrogate engine control unit fault memory. |
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| If vehicle driving performance is faulty or there is a customer complaint and the exhaust gas warning lamp does not light up, consult the fault memory. there may be a fault type stored in the memory with which the warning lamp does not light up instantly. |
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| Switch ignition on: The exhaust gas warning lamp should light up. |
| If the exhaust gas warning lamp does not light up with the ignition on: |
| If the exhaust gas warning lamp lights up with the ignition on: |
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| Start engine and run at idling speed: The exhaust gas warning lamp should switch off after a few seconds. |
| If the exhaust gas warning lamp does not light up: |
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| Interrogate fault memory, eliminate any faults and clear the memory → Chapter, Fault memory; consulting and clearing. |
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