2001 Chevy Silverado can't read the computer

Tiny
GLITERAL
  • MEMBER
  • 2001 CHEVROLET SILVERADO
Electrical problem
2001 Chevy Silverado V8 Four Wheel Drive Automatic

I have a bad hesatation at times it just wont take gas. When they try to read the codes it won't let them. I have a any suggestions. Thanks George
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Tuesday, August 19th, 2008 AT 10:28 PM

12 Replies

Tiny
SERVICE WRITER
  • EXPERT
5.3

Check the fuel pressure to find out if it is a lack of pressure, must be in spec.

Also, is there any smell of raw fuel from under the hood?

These have had a problem with a leaking fuel pressure regulator and bad connector at the fuel pump.

As far as the codes, check the fuse for the DLC.
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Wednesday, August 20th, 2008 AT 5:08 AM
Tiny
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Hi, I can't find the DLC fuse. There is no fuse labeled with DLC. There is no smell of gas coming from under the hood. I replaced the fuel pressure regulator (not much help but some) I still need to find someone to check the fuel pump pressure. Thanks George
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Thursday, August 21st, 2008 AT 9:23 PM
Tiny
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I apologize, I should have been clearer. The DLC (Data Link Connector) is on the fuse labeled CIGAR.
The CIGAR fuse supplies power to the DLC terminal 16.
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Friday, August 22nd, 2008 AT 7:47 AM
Tiny
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Hi, I got the code reader fixed it was the fuse. Thanks. I had the codes checked at a local parts store. They are PO131, PO151, PO171, PO174, P1133 & P1153. Can you tell me what the problem is. Thanks George
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Saturday, August 23rd, 2008 AT 6:09 PM
Tiny
MERLIN2021
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P0131, p0151, p1133 and p1153 are all O2 sensor lean and not switching Time for new O2 sensors and usually the ECT (engine coolant temp) sensor as well.171 and 174 are lean codes, should clear up with new O2 sensors.
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Saturday, August 23rd, 2008 AT 7:17 PM
Tiny
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Hi, With ones do I replace? The ones before or after the catalytic converters. If I right there are 4 total. Thanks George
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Saturday, August 23rd, 2008 AT 8:18 PM
Tiny
MERLIN2021
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Both sets of codes are for upstream sensore, b4 the cat, but if you have over 100,000 miles do em all.
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Sunday, August 24th, 2008 AT 6:18 AM
Tiny
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Hi, Well I replaced all four of the o2 sensors the two in front of the converter and the two after the converter, the fuel pressure regulator and cleaned the mass air flow sensor. And it is sill doing the same thing. Do you have any suggestions? Thanks George PS water temp sensore I have not replaced.
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Sunday, August 24th, 2008 AT 4:18 PM
Tiny
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Hi, Well I replaced all four of the o2 sensors the two in front of the converter and the two after the converter, the fuel pressure regulator and cleaned the mass air flow sensor. And it is sill doing the same thing. Do you have any suggestions? Thanks George PS water temp sensore I have not replaced.[/Quote:73e98198a6]
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Monday, August 25th, 2008 AT 12:09 PM
Tiny
MERLIN2021
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You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! Any modifications? Like different air filter?
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Monday, August 25th, 2008 AT 5:30 PM
Tiny
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After all the work and money it was the fuel pump. Thanks George
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Friday, August 29th, 2008 AT 7:52 PM
Tiny
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I'm surprized the fuel pressure was in spec with a bad pump. You did replace the connector as mentioned in the beginning I hope, or that pump may go south.
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Sunday, August 31st, 2008 AT 7:08 AM

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