I have a 2000 Sirion F-Speed which has run faultless for the past six years when I purchased it. Occasionally the engine light came on and after having the car checked on diagnostics it came back with two fault codes for the pre-cat oxygen sensor.
The car drove and started perfectly however and the light would go out. Twelve months later the same problem has happened again and now when you try to start the car from cold if it fires it goes into limp mode for about 20 secs and runs ok. When warm it runs and starts perfect every time.
Have replaced the sensor which has made no difference whatsover. Any one had a similiar problem?
Thanks