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Overheating

Tiny
STEVENG21
  • MEMBER
  • 1997 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
My 1997 Tahoe is overheating. I have replaced the radiator, water pump, thermostat, and fan, but it is still overheating. It is also smoking like crazy out of the tail pipe. I hooked it up to a OBD 2 scanner and it threw these codes out:

MAF/VAF A circuit low input P0102
Close loop fuel control insufficient coolant temp P0125
O2 sensor heater circuit malfunction Bank 2 sensor 1 P0155
Enging coolant circuit low input P0117

What do I need to do to get this thing running right?
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Wednesday, June 1st, 2011 AT 11:58 AM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
What color is the smoke you're seeing?
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Wednesday, June 1st, 2011 AT 12:16 PM
Tiny
STEVENG21
  • MEMBER
  • 4 POSTS
It is a really thick white smoke.
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Wednesday, June 1st, 2011 AT 12:27 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That means you're burning coolant. You have either a bad intake manifold gasket or a more serious blown head gasket.
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Wednesday, June 1st, 2011 AT 12:30 PM
Tiny
STEVENG21
  • MEMBER
  • 4 POSTS
What am I looking at price wise to get that fixed? I don't have the tools and know how to do that myself.
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Wednesday, June 1st, 2011 AT 12:33 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Nobody knows unto the engine is taken apart and the degree of damage is determined.
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Wednesday, June 1st, 2011 AT 12:35 PM
Tiny
STEVENG21
  • MEMBER
  • 4 POSTS
Do you think $1000-1500 will take care of it?
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Wednesday, June 1st, 2011 AT 12:37 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Yes, it should
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Wednesday, June 1st, 2011 AT 12:39 PM

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