Need help
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
You need a key cut which has a correct resistor pellet fitted. Either measure the resistance on your current key and then get one cut with the right setting. Maybe easier (but more $$) to go to a dealer and have him get the correct key for you.
Here are the values if you go DIY
VATS key codes:
The BCM measures the resistance value of the resistance of the pellet and allows the fuel system to operate. If it is within +/-10% the car will start.
To check your key value:
Set your digital volt meter to “ohms mode” and measure the value across the pellet.
The 15 resistor codes are:
Resistance Value (Ohms)
1 0.402 (acceptable range .386-.438)
2 0.523 (acceptable range .502-.564)
3 0.681 (acceptable range .650-.728)
4 0.887 (acceptable range .850-.942)
5 1.130 (acceptable range 1.085-1.195)
6 1.470 (acceptable range 1.411-1.549)
7 1.870 (acceptable range 1.795-1.965)
8 2.370 (acceptable range 2.275-2.485)
9 3.010 (acceptable range 2.890-3.150)
10 3.740 (acceptable range 3.590-3.910)
11 4.750 (acceptable range 4.560-4.960)
12 6.040 (acceptable range 5.798-6.302)
13 7.500 (acceptable range 7.200-7.820)
14 9.530 (acceptable range 9.149-9.931)
15 11.801 (acceptable range 11.320-12.290)
Here are the values if you go DIY
VATS key codes:
The BCM measures the resistance value of the resistance of the pellet and allows the fuel system to operate. If it is within +/-10% the car will start.
To check your key value:
Set your digital volt meter to “ohms mode” and measure the value across the pellet.
The 15 resistor codes are:
Resistance Value (Ohms)
1 0.402 (acceptable range .386-.438)
2 0.523 (acceptable range .502-.564)
3 0.681 (acceptable range .650-.728)
4 0.887 (acceptable range .850-.942)
5 1.130 (acceptable range 1.085-1.195)
6 1.470 (acceptable range 1.411-1.549)
7 1.870 (acceptable range 1.795-1.965)
8 2.370 (acceptable range 2.275-2.485)
9 3.010 (acceptable range 2.890-3.150)
10 3.740 (acceptable range 3.590-3.910)
11 4.750 (acceptable range 4.560-4.960)
12 6.040 (acceptable range 5.798-6.302)
13 7.500 (acceptable range 7.200-7.820)
14 9.530 (acceptable range 9.149-9.931)
15 11.801 (acceptable range 11.320-12.290)
Last edited by DeeGee; Mar 5, 2009 at 02:28 AM.
Racer
Joined: Jan 2009
Posts: 279
Likes: 1
From: North Port Florida
I got the dealership to run my vin and tell me what the vats code was. I then found a few places on-line that sell key blanks for about $12-$15. I had my key cut at a local hardware store and have used it ever since with no problems. Dealership didn't charge me anything to get the code.
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Joined: Mar 2001
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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I got the dealership to run my vin and tell me what the vats code was. I then found a few places on-line that sell key blanks for about $12-$15. I had my key cut at a local hardware store and have used it ever since with no problems. Dealership didn't charge me anything to get the code.
Once you have the VATS code, a locksmith should be able to make a key for you.
