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c5 not starting.. code P1631 H
Thread Starter
Intermediate
Joined: Aug 2012
Posts: 48
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From: Southern Idaho
c5 not starting.. code P1631 H
Hey guys my c5 likes to randomly not start.. I pulled the codes and the one that stands out after researching everything is P1631 H.. I dont have key fobs for my car so i was thinkin it had to do with unlocking it and locking it sometimes.. but it happens so random that its hard to tell
What should my next move be? Ive got a new key made and still the same thing.. Someone help me out please
What should my next move be? Ive got a new key made and still the same thing.. Someone help me out please
Thread Starter
Intermediate
Joined: Aug 2012
Posts: 48
Likes: 0
From: Southern Idaho
Lots of potential causes for C5's not starting including Security related problems as P 1631 might indicate.
What other codes do you have??? Have you cleared all the codes? If so what codes come back after you clear them???
When the car will NOT start, what is happening to the security light on the dash??? ON solid?? Flashes??? OUT???? Comes on and then goes out??????
What other codes do you have??? Have you cleared all the codes? If so what codes come back after you clear them???
When the car will NOT start, what is happening to the security light on the dash??? ON solid?? Flashes??? OUT???? Comes on and then goes out??????
other codes are
PMC:p1571 h
BCM: b2527 HC
Hvac: B0333 hc
Thread Starter
Intermediate
Joined: Aug 2012
Posts: 48
Likes: 0
From: Southern Idaho
Key is not being read correctly. If you have replaced the key then the problem likely lies with the sensing wire in the lock cylinder. These get a layer of oxidation on them over the years or get damaged by key insertion.
You can try the following to clean the wire and it may work:
Get a small aerosol container of electrical contact cleaner. (For certain Radio Shack will have this but many parts stores have it also. Spray some into the lock cylinder and then insert and remove the key a dozen or so times wiping the key off with a clean lint free cloth. Repeat if necessary.
If this doesn't clean the sensing wire that contacts the resistor pellet on the key to read it, then your choices are two:
1) Replace the ignition cyclinder.
2) Bypass VATS.
I personally would do #1 if the cleaning fails to correct the problem.
You can try the following to clean the wire and it may work:
Get a small aerosol container of electrical contact cleaner. (For certain Radio Shack will have this but many parts stores have it also. Spray some into the lock cylinder and then insert and remove the key a dozen or so times wiping the key off with a clean lint free cloth. Repeat if necessary.
If this doesn't clean the sensing wire that contacts the resistor pellet on the key to read it, then your choices are two:
1) Replace the ignition cyclinder.
2) Bypass VATS.
I personally would do #1 if the cleaning fails to correct the problem.
Thread Starter
Intermediate
Joined: Aug 2012
Posts: 48
Likes: 0
From: Southern Idaho
I think i will try and bypass it
Thread Starter
Intermediate
Joined: Aug 2012
Posts: 48
Likes: 0
From: Southern Idaho
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Thread Starter
Intermediate
Joined: Aug 2012
Posts: 48
Likes: 0
From: Southern Idaho
I would check with them. That's a 2005 post.... Same deal MAY NOT still be available.
I would also check out the ignition switch. The diagnosis is easy if you have and can use a Digital Multi Meter (DMM). Certainly I'd do the diagnosis before I spent any money on parts..... JMHO.
I would also check out the ignition switch. The diagnosis is easy if you have and can use a Digital Multi Meter (DMM). Certainly I'd do the diagnosis before I spent any money on parts..... JMHO.
