Manufacturer Code Charts: 2053

[1] Exhaust gas temperature monitoring: The temperature difference between components B19 (TWC temperature sensor) and B19/9 (Temperature sensor upstream of diesel particulate filter) is too great.


Possible cause:

- B19/9 (Temperature sensor upstream of diesel particulate filter)
Affected functions:

- Exhaust system

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Test 1: Check component B19/9 (Temperature sensor upstream of diesel particulate filter).

Test 2: Check component B19 (TWC temperature sensor).

1. Check component B19/9 (Temperature sensor upstream of diesel particulate filter).
Plausibility check of component 'B19/9 (Temperature sensor upstream of diesel particulate filter)'
Test sequence :In the following test, the engine speed is raised to check the temperature sensor.Specified value

- The temperature difference between component B19 (TWC temperature sensor) and B19/9 (Temperature sensor upstream of diesel particulate filter) must not be larger than 60° C.
Start engine.Continue with button F2

Warning!Communication with ECU required.


2. Check component B19 (TWC temperature sensor).
Plausibility check of component 'B19 (TWC temperature sensor)'
Test sequence :In the following test, the engine speed is raised to check the temperature sensor.Specified value

- The temperature difference between component B19 (TWC temperature sensor) and B19/9 (Temperature sensor upstream of diesel particulate filter) must not be larger than 60° C.
Start engine.Continue with button F2

Warning!Communication with ECU required.