Volvo Owners Club Forum - View Single Post - S40 (New) Electrics :

tedmikaelo · Feb 13th, 2018, 15:56

Hello, I own a 2005 Volvo S40 with the 1.8 petrol 125hp engine. Every now and then my windshield wipers starts out of nowhere and won't turn off, then the turnsignals stop working, multiple warning lights light up on the dashboard(faulty brakes, stability control faulty, CEL, battery light, warning for loss of engine power and so on..), then the gas pedal gets very weird(if working at all). Then all of a sudden these problems go away after a while, all at the same time? In desperate need of help! I've recently replaced alternator so that can be ruled out. Any ideas where to start looking? Scanned for codes and the only code it gives is U1900.

Feb 13th, 2018, 15:56	#1
tedmikaelo New Member Last Online: Mar 11th, 2018 22:47 Join Date: Feb 2018 Location: Hanko	S40 multiple electronic parts failing Hello, I own a 2005 Volvo S40 with the 1.8 petrol 125hp engine. Every now and then my windshield wipers starts out of nowhere and won't turn off, then the turnsignals stop working, multiple warning lights light up on the dashboard(faulty brakes, stability control faulty, CEL, battery light, warning for loss of engine power and so on..), then the gas pedal gets very weird(if working at all). Then all of a sudden these problems go away after a while, all at the same time? In desperate need of help! I've recently replaced alternator so that can be ruled out. Any ideas where to start looking? Scanned for codes and the only code it gives is U1900. Last edited by tedmikaelo; Feb 13th, 2018 at 16:08.