Volvo S40 owners have reported 2 problems related to gas recirculation valve (egr valve) (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Volvo S40 based on all problems reported for the S40.
Egr or aka. Oil trap housing, tubing is broken and sucking in air. Improper ventilation is tripping off emission code on dash. Brittle black plastic housing, defective in nature and by design. Potential other issues is the unwanted pressure build up in engine which can cause premature failure of oil cam seals which I also experienced.
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all problems of the 2006 Volvo S40
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The contact owns a 2006 Volvo S40. While driving at any speed, the air condition emits hot air. The failure occurs while the air conditioner is set at 65 degrees. The outside temperature gauge was replaced, but that did not remedy the failure. The vehicle has been taken to two dealers on approximately twelve occasions. The vehicle still has not been properly repaired. The current mileage was 3,100 and failure mileage was 500.