Hello folks,

I have a 1999 Volvo S40 1.6 SE. Recently the lambda indicator has started coming on after driving the car for a few miles. If i go straight on the highway and drive at high speed the indicator does not come on or takes a long time to come on. But when driving in the city the light comes on after 10 minutes or so.

I took it to the dealer who ran a diagnostic test. The test indicated a faulty ambient temperature sensor. I had the sensor replaced and the labmda indicator control reset. For a few days it was fine but after a while the indicator started coming on again.

Does anyone have an idea on what may be causing this? I also noticed that the acceleration from low speed is not smooth. Any comments suggestions will be most helpful.

Thank you in advance,

Dimitris

 

Have someone pull the codes again and see what they are.