· Engine running for at
least 40 s
· Coolant temperature
higher than 75 °C/167 °F
· Throttle valve aperture
greater than 0 %
· Following trouble codes
not stored: 21,22
· The fault is recognized
by the control unit if the oxygen sensor voltage is in the range 350 to 550
mV for longer than 20 s
(lead interruption, oxygen sensor defective).
If trouble
code 13 was recognized, the control unit takes 450 mV as replacement voltage
(oxygen
sensor control switched off).
Note:
If the oxygen
sensor is wrapped in aluminium foil, remove the foil. Then delete trouble
code. If trouble code is set again, start trouble-shooting.
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