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code P0641 2005 saturn relay


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patricio
New User

Sep 29, 2013, 7:10 AM

Post #1 of 5 (4153 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
Hammer Time profile image

Sep 29, 2013, 7:38 AM

Post #2 of 5 (4144 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



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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
Discretesignals profile image

Sep 29, 2013, 7:47 AM

Post #3 of 5 (4141 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.





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patricio
New User

Sep 29, 2013, 8:56 PM

Post #4 of 5 (4121 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
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Sep 30, 2013, 5:51 AM

Post #5 of 5 (4110 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







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