Check Engine Light Illuminated And DTC Code PO442 Set (47.30/06)

Publication date: 2000-06-06
Reference number: 47.30/06

CHECK ENGINE LIGHT ILLUMINATED AND DTC CODE PO442 SET

TECHNICAL SERVICE BULLETIN

Reference Number(s): P-SI-47.30/06, Date of Issue: June 6, 2000

MERCEDES-BENZ:	MODEL 129.068 (as of M.Y. 2000); MODEL 210.065/070/074/082/083/265/282 (as of M.Y. 2000); MODEL 170.465 (as of M.Y. 2001); MODEL 215.375 (as of M. Y. 2001); MODEL 220.170/175 (as of M.Y. 2001)
GROUP:	47 - Fuel system

SUBJECT

CHECK ENGINE LIGHT ILLUMINATED AND DTC CODE PO442 SET

SERVICE INFORMATION

If the complaint: "Check Engine Light Illuminated" with DTC code PO442 is received, a check of the Fuel Evaporation System must first be made (Fig 1 ) (Model 129 shown).

Fig 1: Fuel Evaporation System Diagram (Model 129)

In addition to the repair procedure noted below, please also follow the test repair instructions as outlined in the service literature below:

For Models 170 and 210 with engines 112, 113: Diagnostic Manual, Engines, Volume 4, Section 9.3 (engine 112) and 9.4 (engine 113).
For Models 215 and 220 with engines 112, 113: Star Diagnosis System.

PROCEDURE

This repair step applies to all models.

1) Locate the purge valve (Y58/1) (Model 129 shown) and utilize two hose clamps, Part Number 003 997 9190 at the connection (arrows, Fig 2 ), to ensure maximum clamping efficiency.

NOTE: Use only clamp type hose clamps as described, do not use screw type hose clamps. Additionally, to avoid damage to the hoses/pipes, ensure that the hose clamps are correctly installed i.e. not crocked and/or over tightened.

Fig 2: Purge Valve Connection

This repair step applies to Model 129 only.

2) Locate the flexible hose in the fender well area (Fig 3 ), then check and replace if necessary, the two hose clamps (arrows, Fig 3 ), part number 005 997 8390, to ensure maximum clamping efficiency.

Fig 3: Flexible Hose In Fender Well Area

As an overview, please see Fig 4 below.

The two vertical arrows next to Y5B/1 show the location of two clamps for all models as indicated in step 1 of the repair procedure.

The two horizontal arrows which show (as shown on the vertical line) the location of two clamps, are for Model 129 only

Fig 4: Clamp Locations In Fuel Evaporation System Diagram

After all clamps are installed, please check the fuel evaporation system for leaks, as described in the Diagnostic Manual section. Have the OBD system perform a "self check" of the leak tests before the vehicle is released to the client.

LABOR INFORMATION

Operation: If needed, install hose clamps at the purge valve connection (all Models) and hose clamps at the flexible hose (Model 129 only) in the fender well.

LABOR INFORMATION

Damage Code	Operation Number	Text	Time (hrs.)	Model Indicators(s)
47 144 03	47-0000	Install clamps to purge valve hose and flexible/ metal hose	0.6	98
47 144 03	47-0000	Install clamps to purge hose	0.2	E0, F0, G0, M0, N0

PARTS INFORMATION

Qty.	Part Name	Part Number
2	Hose clamp	003 997 9190
2	Hose clamp	005 997 8390