One problem related to dash wiring has been reported for the 2000 Volvo S40. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Volvo S40 based on all problems reported for the 2000 S40.
Instrument panel was defective. Warning lights kept coming on. Also, engine check light comes on along with windshield wiper lights, and etc. Contacted dealer, and the dealer did not know what the problem was.