2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 292

-------------------------------------------------

Test 1: Learning of the throttle valve stop

1. Learning of the throttle valve stop

Warning!Communication with ECU required.

0230

Due to a possible leak in the intake air system, an implausible signal was received from oxygen sensor 1 (cylinder bank 1).

Possible cause:

- Intake system

Affected functions:

- Engine diagnosis

- Exhaust system

-------------------------------------------------

Test 1: 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.

0234

Due to a possible leak in the intake air system, an implausible signal was received from oxygen sensor 1 (cylinder bank 2).

Possible cause:

- Intake system

Affected functions:

- Engine diagnosis

- Exhaust system

-------------------------------------------------

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.

0237

The request for fan output is implausible.

Possible cause:

- Heat management

Affected functions:

- Engine cooling

-------------------------------------------------

Test 1: Check component M4/7 (Engine and AC electric suction fan with integrated control).

1. Check component M4/7 (Engine and AC electric suction fan with integrated control).

Test 1.1: Check component M4/7 (Engine and AC electric suction fan with integrated control) by means of actuation.