Lambda sensor

WARNING: When the engine is running all the exhaust pipes and in particular the catalytic converter get very hot. It is therefore necessary to leave the engine off for a suitable length of time before doing any work. Never touch the catalytic converter without suitable protection, such as gloves, etc. Never leave easily inflammable materials near the catalytic converter.

LAMBDA SENSOR

For this description, refer to 1996 TB.

REMOVING/REFITTING

• Set the car on a lift.
• Disconnect the battery (-) terminal.

1. Disconnect the electrical connections from the lambda sensor.

1. Slacken the bolts fastening the catalytic converter to the front section of the exhaust piping, then lower the piping just enough to gain access to the lambda sensor.
2. Slacken and remove the lambda sensor complete with wiring.

50 ÷ 60 Nm
5.1 ÷ 6.1 kgm

CHECKING EMISSIONS AT THE EXHAUST

WARNING: Exhaust emissions must be checked outdoors, or at least in a suitable place equipped according to the regulations in force.

The control should be carried out with the engine at normal operating temperature (i.e. when the fan has turned on and then off) and running at idle speed. If the idle speed is not within the specified limits, check the constant idle speed actuator.

• Check that the engine oil level is correct and that the air cleaner cartridge is clean.
• Start the engine and keep it at idle speed.

1. Insert the feeler of the analyzer in the end piece of the exhaust pipe and check that the amount of CO and HC are within the specified limits.