Lambda probe (0.258.003.466)

LAMBDA PROBE (0.258.003.466)

The vehicle is fitted with a four channel hot lambda probe which measures exhaust gas oxygen content. Refer to Fuel System section in the 1581 16V manual for a full description of the lambda probe

The probe may be swiftly put out of service by the presence of even slight amounts of lead in the fuel.

Removing-refitting

• Place the vehicle on a lift.
• Disconnect battery negative lead.
• Raise the vehicle
• Disconnect electrical connection
• Remove the lambda probe from its seat.
• When tightening, do not force the component or it could be irreparably damaged.

If fitting a new lambda probe, spread threaded part with anti-seize graphite grease (e.g. Bosch VS 14016- FT).

Tightening torque 5 - 6 daNm

Wiring connector

The numbers in boxes indicate the corresponding control unit pins.

Checking resistance

Probe heater resistance may be measured by disconnecting connector and connecting an ohmmeter as shown in the figure.

Resistance: 4.5 ± 0.5 ohm at 20 °C