2001 Volvo S40 occasionally stalls when sitting at idle waiting for street light to change Turn key starts right up Why?

Answer 1

I received a recall notice from Volvo for my 2004 S60. There is a defective part in the Fuel Pressure regulator that they have to modify or change out.AnswerI had a similar problem with my 2001 S40 a couple of weeks ago. The mileage on mine is 96K. I knew something was wrong because the car was also hesitating alot on acceleration (greatly reduced power). The "check engine" light did not come on right away, but eventually did. There was some difficulty in diagnosing the problem, but the techs ended up replacing 2 sensors: the boost sensor and the map sensor. Not sure why, but each of the parts has the same part #9125462. The error codes in my case were: Code ECM - 14 Mass Air Flow Code ECM - OD Manifold pressure sensor signal too low Code ECM - OC Boost pressure signal too low

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Answercheck your fuel pump relay. You'd be surprised!! AnswerI had the same problemon my 2001 s40. Problem was the fuel pressure controller and idle control value. AnswerI'm having the same problem even after two visits to the the dealer. Just today when the engine stalled again the DSA light came on with the check engine light and stayed on. I couldn't put the DSA back on even when I pressed and held the button which usually works. While the DSA was off the car never stalled. Later when I started the car again the DSA was on again and the stalling continued. I have a feeling it has something to do with the DSA since the DSA cuts engine power when it detects wheelspin. Maybe the DSA sensor or something similar wrongly detects wheelspin and cuts engine power and since the engine is already under 1k rpm it just stalls?