Audi Workshop Service and Repair Manuals > A3 Mk2 > Power unit | Direct petrol injection and ignition system (4-cyl. 1.8 ltr. 4-valve turbo with timing chain) | Mixture preparation system, electronic inj.,Gas | Lambda probes | CDAA: Removing and installing Lambda probe after catalytic converterG130 and Lambda probe 1 heater after catalytic converterZ29

CDAA: Removing and installing Lambda probe after catalytic converterG130 and Lambda probe 1 heater after catalytic converterZ29

CDAA: Removing and installing Lambda probe after catalytic converter -G130- and Lambda probe 1 heater after catalytic converter -Z29-

Special tools and workshop equipment required

t	Lambda probe open ring spanner set -3337-

Removing Lambda probe

–	Remove cover (right-side) from underbody.

–	Unplug electrical connector -arrow- for Lambda probe after catalytic converter -G130- and Lambda probe 1 heater after catalytic converter -Z29-.

–	Unscrew Lambda probe after catalytic converter -G130--1- using tool from Lambda probe open ring spanner set -3337- (arrow indicates direction of travel).

Installing Lambda probe

When installing, note the following:

Note

t	Threads of new Lambda probes are already coated with assembly paste; the paste must not get into the slots on the probe body.

t	In the case of a used Lambda probe grease only the thread with high-temperature paste. The paste must not get into the slots on the Lambda probe body. High-temperature paste → Parts catalogue

t	When installing, the Lambda probe wire must always be reattached at the same locations to prevent it from coming into contact with the exhaust pipe.

l	Tightening torque: Lambda probe - overview → Chapter

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