Preconverter output temperature sensor operation check
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Emission control system › Preconverter output temperature sensor operation check
PRECONVERTER OUTPUT TEMPERATURE SENSOR OPERATION CHECK
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Check whether error P2080 - Temperature sensor on preconverter output - is present using the diagnostic equipment | Replace the temperature sensor Op. 1080B64 CATALYTIC CONVERTER EXCESS TEMPERATURE THERMOCOUPLE - R + R |
| 2 | Press the START/STOP button and turn off the engine. Disconnect the wiring harness connector from the upstream particulate filter temperature (DPF) Press the START/STOP button. Check that the voltage across pin 1 and 2 of the sensor See K189 UPSTREAM PARTICULATE FILTER TEMPERATURE SENSOR (DPF) is greater than 4.8 V. Move on to Step 4 | Move on to Step 3 |
| 3 | If faults are found, restore the wiring between the engine control unit and the downstream temperature sensor See E5070 PARTICLE FILTER SYSTEM Replace the wiring if necessary The test can be considered over | Replace the engine management control unit |
| 4 | Press the START/STOP button. Check that the resistance across pin 1 and 2 of the sensor See K189 UPSTREAM PARTICULATE FILTER TEMPERATURE SENSOR (DPF) is between 200 and 600 Ohms | Replace the temperature sensor Op. 1080B64 CATALYTIC CONVERTER EXCESS TEMPERATURE THERMOCOUPLE - R + R |
| 5 | Replace the engine management control unit |
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