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code P0641 2005 saturn relay Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine ODB2 Fault Codes patricio New User Sep 29, 2013, 7:10 AM Post #1 of 5 (6990 views) code P0641 2005 saturn relay Sign In I started having problems yesterday the car stalled while driving and it keeps on stalling every minute or so. I hooked my code reader and. Originally got P0541 and P0543. I foolishly cleared these codes and now it shows P0641. I know i really need a tune up so im changing plugs air filter and fuel filter. Butt i think that code is ecm related .. please help Hammer Time Ultimate Carjunky / Moderator Sep 29, 2013, 7:38 AM Post #2 of 5 (6981 views) Re: code P0641 2005 saturn relay Sign In P0541 Intake Air Heater A Circuit Low P0543 Intake Air Heater A Circuit Open P0641 Sensor Reference Voltage A -Circuit Open You need model and engine size to go any further ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Discretesignals Ultimate Carjunky / Moderator Sep 29, 2013, 7:47 AM Post #3 of 5 (6978 views) Re: code P0641 2005 saturn relay Sign In Quote P0641 Sensor Reference Voltage A -Circuit Open That will definitely cause stalling. If it is intermittent, your going to have a fun time figured it out unless you see something obvious. You'll need to monitor the 5 volt reference circuit to see if it dropping out when your stalling occurs. You'll need a DSO because a meter may not be fast enough to catch it. If you find out the 5 V is dropping out, the fun part is figuring out why. An experienced tech with the right equipment should be able to figure it out. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. patricio New User Sep 29, 2013, 8:56 PM Post #4 of 5 (6958 views) Re: code P0641 2005 saturn relay Sign In I solved the problem, i checked map sensor .. ok. Then i read a post to check wiring harness in under carriage just behind drivers seat...when i removed the three connections there, they were full of water and starting to corrode. (I remember that week my shop vac was full of water and it tipped over)..cleaned them vacuumed them dry (he! he!) And replaced them. Took it for a drive and presto no more codes or stalling.. thanks to all for your replies Tom Greenleaf Ultimate Carjunky / Moderator Sep 30, 2013, 5:51 AM Post #5 of 5 (6947 views) Re: code P0641 2005 saturn relay Sign In Seems you found the trouble with the connectors. Just remember to go back there if it comes back and hope you rust/corrosion proofed there. I'll close this as solved, T   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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