Engine Controls - DTC's 280A/260A/261A/262A/2A1A Set
S70/70 -2000/C701999-2002
Section:
2
Group:
25
No.:
0033
Year:
02
Month:
09
Vehicles involved:
B52X4 Turbo
Heated oxygen sensor (HO2S), replacing
Background
To prevent contamination from affecting the reference air for the heated oxygen sensors (HO2S) new routing has been developed for the sensor wiring. The following diagnostic trouble codes (DTCS) could be stored in the engine control module (ECM) due to harness contamination: 280A, 260A, 261A, 262A, 2A1A. Should no faults be detected for these DTCs after fault tracing according to VADIS, replace the effected heated oxygen sensors (HO2S) and install adaptor wiring harness The new adaptor wiring harness must also be installed for the remaining sensor.
Affected cars
Material
Catalytic converters and emissions equipment
Heated oxygen sensor (HO2S), replacing
The connectors for the heated oxygen sensors (HO2S) are located 1
on the transmission.
Preparations 2
Switch off the ignition.
Remove the air cleaner (ACL) housing
Detach the inlet hose between the air cleaner (ACL) and the turbocharger (TC) from the turbocharger (TC).
Open the catches and disconnect both front and rear connectors for the heated oxygen sensors (HO2S)
Heated oxygen sensors (H02S), removing 3
Replacing the front and rear heated oxygen sensors (HO2S), see VADIS:
Preparation and installation, Function group 25 Replacing components, Heated oxygen sensors (HO2S) replacing.
Installing the front sensor adapter wiring 4
Install:
- the adapter wiring between the existing 4-pin connectors
- a tie strap as illustrated.
Note!
Ensure that the ends of the adapter wiring protective sheath point downwards so that water does not gather in the protective sheath.
Installing the rear sensor adaptor wiring 5
Install the adapter wiring between the existing 6-pin connector.
Note!
Ensure that the ends of the adapter wiring protective sheath point downwards so that water does not gather in the protective sheath.
Install:
- the inlet hose between the air cleaner (ACL) and turbocharger (TC) on the turbocharger (TC)
- the air cleaner (ACL) housing.
WARRANTY STATEMENT: Claims may be submitted under the New Car Warranty when there is a documented customer complaint, using claim type 01.