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Anti-theft, ABS, Traction control lights are on

Tiny
MROULET1
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 4.6L
  • V8
  • 104,000 MILES
Rings appear around all my gears on my dash and start flashing with my fuel rang looking like - - - then saying the the rang again. While saying may not restart. On top of the ABS light coming on and the traction control light. The ABS light only come on when the anti-theft light stuff happen. It still started up, but I changed the key out it went away for a little then came back on saying and doing the same thing. Now my battery went dead. It still starts up. I’m thinking about changing out the ignition cylinder?
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Friday, August 23rd, 2019 AT 9:01 PM

34 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The first thing I would do is to charge the battery back to 12.6 volts.

https://www.2carpros.com/articles/how-to-charge-your-car-battery

Then check the charging system to be sure the alternator is working.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

This would explain a lot of the issues. Low voltage will cause all kinds of issues as the modules cannot function without the correct voltage.

Roy
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Saturday, August 24th, 2019 AT 6:08 AM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
I just replaced the alternator a month ago. I’m replacing the battery today. If I still have the same problem what should I do next?

Another thing is, I have to turn the key over once or twice before it turns over. After starting as long as it don’t sit for a long time it will fire right up. Also have a lean code bank 1 and 2.
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Saturday, August 24th, 2019 AT 7:11 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
What are the codes?

Replace the battery and check the voltage at the battery with the engine running.

Roy
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Saturday, August 24th, 2019 AT 7:17 AM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
Codes are po171 and po174. Some research says it’s a vacuum leak or mass air flow sensor.
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Saturday, August 24th, 2019 AT 7:30 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, thanks.

I would check the fuel pressure. That is a common cause for the code.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Yes, it could be a vacuum leak. You need a scan tool to monitor the long term trims.

Roy
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Saturday, August 24th, 2019 AT 7:55 AM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
How do I check the fuel pressure? I did press the value and gas’s shot out. Fuel pump replaced a month ago as well. It was having the issue before hand.
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Saturday, August 24th, 2019 AT 12:36 PM
Tiny
ASEMASTER6371
  • MECHANIC
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I sent you a guide for checking the pressure. You need a gauge as the needed pressure is very specific.

Roy
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Saturday, August 24th, 2019 AT 12:40 PM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
So I replaced my battery and alternator tested good and my anti theft is still on and doing the same thing I said before.
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Saturday, August 24th, 2019 AT 6:11 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You may be right about the lock cylinder it is common for the 2 wire to fail and cause this issue.

Roy
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Saturday, August 24th, 2019 AT 6:18 PM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
Is it common for the car to still start? So like a warning that it’s going out.
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Saturday, August 24th, 2019 AT 6:22 PM
Tiny
ASEMASTER6371
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If the wires are broken, no, it will not start. If they are frayed, yes, it will be intermittent.

As far as the fuel pump, yes, that would cause it to start intermittently.

Roy
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Sunday, August 25th, 2019 AT 4:10 AM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
Another question my A/C will be blowing good then slow down and stop feeling cold.
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Monday, August 26th, 2019 AT 4:08 PM
Tiny
ASEMASTER6371
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Okay, by site rules, I can only deal with one issue at a time.

Please send a new question and I will be glad to assist with the A/C issue.

Roy
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Monday, August 26th, 2019 AT 4:13 PM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
My anti theft light came on all yesterday. Now that I have the new parts it haven’t came on one time?
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Tuesday, August 27th, 2019 AT 9:06 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Good deal. Let us hope it stays off.

Roy
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Tuesday, August 27th, 2019 AT 9:12 AM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
Well I have yet to put the new parts in.
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Tuesday, August 27th, 2019 AT 9:31 AM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
Someone also told me that it can just very well just be the key is bad. But both keys being bad?
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Tuesday, August 27th, 2019 AT 9:32 AM
Tiny
ASEMASTER6371
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No, not at all. I do not agree with that assessment.

I would replace the lock cylinder.

Roy
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Tuesday, August 27th, 2019 AT 12:45 PM
Tiny
MROULET1
  • MEMBER
  • 76 POSTS
Okay, will do tomorrow and will let you know how it goes.
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Tuesday, August 27th, 2019 AT 1:42 PM
Tiny
ASEMASTER6371
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Sounds like a plan.

Keep me updated.

Roy
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Tuesday, August 27th, 2019 AT 1:44 PM

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