Oxygen Sensor: Service and Repair

Remove/Install Sensor










Remove/Install

DANGER:
- Risk of death. Death may result if vehicle slips or topples from the lifting platform.
- Align vehicle between the columns of the hydraulic hoist and position the four support plates below the hoist support points specified by the vehicle manufacturer.
- Risk of injury to skin and eyes from handling hot or glowing objects.
- Wear safety gloves, protective clothing and safety glasses, if necessary.

1 Remove bottom engine compartment

NOTE: Installation: Install engine compartment paneling paneling only after engine test run.

2 Unclip electrical connector (G3/3x1 up to G3/6x1) and feed line of left or right O2 sensor upstream or downstream TWC (G3/3 up to G316) from retaining clamps
3 Disconnect electrical connector (G3/3x1 up to G3/6x1) of left or right O2sensor upstream or downstream TWC (G3/3 up to G3/6)
4 Remove left or right O2 sensor upstream or

NOTE: Installation: Coat the thread with heat-downstream TWC (G3/3 up to G3/6) resistant lubricant.

- O2 sensor to exhaust pipe/exhaust manifold:
- (Engine 112, 113.967) = 55 Nm
- (Engine 113.990 = 50 Nm
- Box wrench bit: See Special Tools below.

5 Install in the reverse order
6 Read out fault memory with STAR DIAGNOSIS and erase if necessary
- Diagnosis system STAR DIAGNOSIS

DANGER:
- Risk of accident. Accidents may result if the vehicle starts oft unintentionally with the engine running. Risk of injury as working around the engine during start-up or while running may result in contusions and burns
- Secure vehicle to prevent it from moving.
- Wear closed and snug-fitting work clothes.
- Do not grasp hot or rotating parts.

7 Conduct engine test run and inspect exhaust system for leaks

Special Tools

Ring Wrench Socket, P/N # 000 589 71 03 00: