SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cylinder injection engine (1.6 l engine, roller rocker arms) | Exhaust system | Exhaust system (Engine codes BGU, BSE, BSF, CCSA)

Lambda sensor G39 (before catalytic converter): Removing and installing

Lambda sensor -G39- (before catalytic converter): Removing and installing

t	Removing → Anchor

t	Fitting → Anchor.

Special tools and workshop equipment required

t	Wrench kit -3337-

Removing

–	Detach engine cover -arrows- (according to version).

–	Take electrical connection -arrow- for lambda probe -G39- out (before catalytic converter) of the retainer and separate.

–	Move lambda probe cable clear.

Note

In the following representation, the gearbox is shown removed for increased clarity.

–	Loosen the clamp -1-.

–	Screw out the lambda probe -arrow- with the wrench kit -3337-.

Note

The engine is shown removed in the figure.

Installing

Installation is carried out in the reverse order of removal while noting the following:

Note

t	When replacing the Lambda probe, delete the learnt values in the engine controller → vehicle diagnosis device, „Guided function“..

t	The screw thread on the new lambda probe is coated with a special paste. The paste must not get into the slots on the probe body.

t	When reusing the lambda probe, only grease the thread with hot bolt paste -G 052 112 A3-; the paste must not get into the slots on the sender body Locking fluid for hot working bolts → ETKA (Electronic parts catalogue)

t	When assembling, the Lambda sender line must be fixed in its original position to avoid contact with the exhaust pipe.

t	Tightening torques: 55 Nm

SEAT Workshop Service and Repair Manuals