Self-inflicted P1640 issue? - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Self-inflicted P1640 issue?
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Posted by Jeff R. from IL [Email] (more from Jeff R. from IL) on Mon, 1 Jun 2015 20:48:14 Share Post by Email
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I got a bit sloppy pouring my 4 liter jug of synthetic oil into the fill tube on my 2002 2.3L Viggen. Pouring too fast, I dribbled oil all over the back of the motor including onto the Alternator.

I sprayed some degreaser on the back of the motor including onto the alternator, then after a spell to air dry I used contact cleaner to try to clean up my mess.

When I tried to fire the motor, it would turn over but not start. I quickly got a CEL code which produced "P1640" High Voltage Warning. I replaced the main relay (under the steering column), cleared the code, and it fired right up.

I ran it for about 4 trips over 24 hours, then tonight I started it up and made it about 30 feet before the car died and tripped P1640 again. I swapped relays again and cleared the code and it started again. Before I shut it off for the night, I put a volt meter on the battery. It looks like I am getting 14.25 volts from the alternator.

Is it likely that I fried the voltage regulator with the oil or degreaser? Any other guesses, tests, or fixes I should consider?

Thanks in advance, all!

2002 9-3 Viggen 2.3L 5-Door
119,515 miles

posted by 50.165.21...

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