2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 505

Possible cause:

- G3/4 (Right O2 sensor, before TWC [KAT])

Affected functions:

- Engine diagnosis

- Exhaust system

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Test 1: Check component G3/4 (Right O2 sensor, before TWC [KAT]).

Test 2: Check component G3/4 (Right O2 sensor, before TWC [KAT]).

1. Check component G3/4 (Right O2 sensor, before TWC [KAT]).

Warning!Communication with ECU required.

2. Check component G3/4 (Right O2 sensor, before TWC [KAT]).

Warning!Communication with ECU required.

0437

Heating of component G3/3 (Left O2 sensor, before TWC [KAT]) : Short circuit to positive / Resistance of sensor heater too low (P0155)

Possible cause:

- G3/3 (Left O2 sensor, before TWC [KAT])

Affected functions:

- Engine diagnosis

- Exhaust system

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Test 1: Check component G3/3 (Left O2 sensor, before TWC [KAT]).

1. Check component G3/3 (Left O2 sensor, before TWC [KAT]).

Warning!Communication with ECU required.

0438

This fault can be ignored and erased.

Possible cause:

- This fault can be ignored and erased.

Affected functions:

- Engine diagnosis

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Test 1: This fault can be ignored and erased.

1. This fault can be ignored and erased.

Note:This fault can be ignored and erased.